If your trunk is full before the cooler goes in, car roof cargo carriers are the cheapest way to add storage without buying a bigger vehicle. After comparing 15 of the most popular options, the Thule Pulse 2 L roof box stands out as the most durable and secure pick thanks to its rigid shell, dual-side opening, and lockable lid. For tighter budgets, the FIVKLEMNZ 21 cubic foot waterproof bag delivers nearly the same capacity for a fraction of the price, and the 15 cubic foot 840D carrier is the smart choice for smaller cars that only need occasional extra space. The core tradeoff in this category is simple: soft bags cost less and fold flat for storage, while hard shells protect against weather and theft but cost five to ten times more. Capacity choices from 15 to 30 cubic feet add another layer, since bigger isn’t always better once you factor in fuel economy and garage clearance. Keep reading for the full breakdown of all 15 carriers and which one fits your vehicle, budget, and travel style.
Complete the kit
Key Takeaways
- Waterproofing claims varied widely: the Asinking 21 cu ft and FIVKLEMNZ models with welded seams and included rain flaps over zips held up best in reviews, while several budget bags leak at the zipper unless you add the supplied seam seal.
- The Thule Pulse 2 L is the only truly lockable, rigid option in this lineup — it costs roughly five times a soft bag but eliminates the theft and weather worries that soft bags can’t.
- The FIVKLEMNZ 30 cubic foot carrier is the largest here, but its size makes it awkward for sedans and crossovers; it only makes sense on SUVs and minivans with long, flat roofs.
- For cars without roof racks, bags with included anti-slip mats and door-clip straps (MIDABAO, DUMOS, Asinking 20 cu ft) are safer and easier to mount than strap-only designs.
- The 15 cubic foot 840D bag was the surprise value pick — same heavy-duty fabric as its 21 cubic foot sibling, just smaller, which suits couples and weekend trips better than family hauls.
| FIVKLEMNZ 21 Cubic Rooftop Cargo Carrier Waterproof Soft Car Roof Bag |  | Best Overall | Material: 840D PVC | Capacity: 21 cubic feet | Dimensions: 52 x 40 x 18 inches | VIEW LATEST PRICE | See Our Full Breakdown |
| Sailnovo Car Rooftop Cargo Carrier 21 Cubic Feet Waterproof Soft Roof Bag |  | Best Weather Protection | Material: 1000D PVC tarpaulin | Capacity: 21 cubic feet | Dimensions: 51.9 x 39.4 x 16.9 inches | VIEW LATEST PRICE | See Our Full Breakdown |
| WORKPRO Rooftop Cargo Carrier Bag, 21 Cubic Feet Waterproof Car Roof Bag |  | Best for Night Driving Safety | Material: 840D PVC | Capacity: 21 cubic feet | Dimensions: 52 x 40 x 17 inches | VIEW LATEST PRICE | See Our Full Breakdown |
| Car Rooftop Cargo Carrier Bag, 21 Cubic Feet, Waterproof, Heavy Duty 840D |  | Best Accessory Bundle | Material: 840D abrasion-resistant PVC | Capacity: 21 cubic feet | Waterproof: Yes, with waterproof zipper | VIEW LATEST PRICE | See Our Full Breakdown |
| MIDABAO 20 Cubic Feet Waterproof Car Roof Top Carrier – Cargo Roof Bag with Anti Slip Mat and Racks (Optional) |  | Best Value Pick | Material: PVC-coated fabric | Capacity: 20 cubic feet | Dimensions: 51.1 x 39 x 17 inches | VIEW LATEST PRICE | See Our Full Breakdown |
| Asinking Car Rooftop Cargo Carrier Bag, 20 Cubic Feet |  | Best Big-Capacity Soft Carrier | Capacity: 20 cubic feet | Waterproof Rating: IPX66 | Material: 900D double-coated abrasion-resistant PVC laminated tarpaulin | VIEW LATEST PRICE | See Our Full Breakdown |
| SportRack Vista XL Rear Opening Cargo Box |  | Best Value Hard Box | Capacity: 18 cubic feet (510 L) | Material: UV-resistant ABS | Dimensions: 63 x 38 x 19 in / 160 x 96.5 x 48 cm | VIEW LATEST PRICE | See Our Full Breakdown |
| Thule Pulse 2 L Roof Mounted Cargo Box |  | Best Premium Hard Box | Capacity: 16 cubic feet | Load Capacity: 75 kg (165 lbs) | Material: ASA-ABS plastic | VIEW LATEST PRICE | See Our Full Breakdown |
| Car Rooftop Cargo Carrier Bag, 15 Cubic Feet Waterproof Heavy Duty 840D |  | Best Budget Pick | Material: 840D abrasion-resistant PVC fabric | Capacity: 15 cubic feet | Waterproof: Yes, with waterproof zipper and reinforced seams | VIEW LATEST PRICE | See Our Full Breakdown |
| FIVKLEMNZ Car Rooftop Cargo Carrier Waterproof Roof Bag |  | Best Mid-Size Soft Carrier | Material: 840D PVC | Capacity: 15 cubic feet | Dimensions: 46 x 34 x 17 inches | VIEW LATEST PRICE | See Our Full Breakdown |
| Sailnovo Rooftop Cargo Carrier Roof Bag, 20 Cuft |  | Best Budget Pick | Capacity: 20 cubic feet | Dimensions: 51″ L x 39″ W x 17″ H | Material: 1000D Oxford cloth | VIEW LATEST PRICE | See Our Full Breakdown |
| Asinking Car Rooftop Cargo Carrier Bag 21 Cubic Feet |  | Best Accessory Bundle | Capacity: 21 cubic feet | Dimensions: 52″ L x 40″ W x 18″ H | Material: 900D PVC tarpaulin | VIEW LATEST PRICE | See Our Full Breakdown |
| FIVKLEMNZ 30 Cubic Feet Waterproof Rooftop Cargo Carrier |  | Best for Big Family Trips | Capacity: 30 cubic feet | Dimensions: 60″ L x 43″ W x 20″ H | Material: 840D PVC | VIEW LATEST PRICE | See Our Full Breakdown |
| Asinking Car Rooftop Cargo Carrier Bag – 100% Waterproof, 21 Cubic Feet |  | Best for Long-Haul Durability | Capacity: 21 cubic feet | Dimensions: 52″ L x 40″ W x 18″ H | Material: 900D abrasion-resistant PVC | VIEW LATEST PRICE | See Our Full Breakdown |
| DUMOS Car Roof Bag Cargo Carrier Waterproof 20 Cubic Feet |  | Best All-Around Starter Bag | Capacity: 20 cubic feet | Material: Heavy-duty PVC | Waterproof: Yes — 100% | VIEW LATEST PRICE | See Our Full Breakdown |
| car roof cargo carrier | Material | Capacity | Includes | Dimensions |
|---|---|---|---|---|
| FIVKLEMNZ 21 Cubic Rooftop Car | 840D PVC | 21 cubic feet | Anti-slip mat, luggage lock, straps, door hooks, storage bag | 52 x 40 x 18 inches |
| Sailnovo Car Rooftop Cargo Car | 1000D PVC tarpaulin | 21 cubic feet | Anti-slip mat, door hooks, straps, lock, storage bag | 51.9 x 39.4 x 16.9 inches |
| WORKPRO Rooftop Cargo Carrier | 840D PVC | 21 cubic feet | 6 safety hooks, 2 reinforced straps, storage bag, user manual | 52 x 40 x 17 inches |
| Car Rooftop Cargo Carrier Bag | 840D abrasion-resistant PVC | 21 cubic feet | Anti-slip mat, door hooks, straps, lock, storage bag | Not specified |
| MIDABAO 20 Cubic Feet Waterpro | PVC-coated fabric | 20 cubic feet | Anti-slip mat, mounting straps | 51.1 x 39 x 17 inches |
| Asinking Car Rooftop Cargo Car | 900D double-coated abrasion-resistant PVC laminated tarpaulin | 20 cubic feet | Non-slip mat, door hooks, combination lock, storage bag, user manual | 40 L x 52 W inches |
| SportRack Vista XL Rear Openin | UV-resistant ABS | 18 cubic feet (510 L) | — | 63 x 38 x 19 in / 160 x 96.5 x 48 cm |
| Thule Pulse 2 L Roof Mounted C | ASA-ABS plastic | 16 cubic feet | — | — |
| Car Rooftop Cargo Carrier Bag | 840D abrasion-resistant PVC fabric | 15 cubic feet | Anti-slip mat, door hooks, straps, luggage lock, storage bag | — |
| FIVKLEMNZ Car Rooftop Cargo Ca | 840D PVC | 15 cubic feet | Anti-slip mat, luggage lock, reinforced straps, door hooks, storage bag | 46 x 34 x 17 inches |
| Sailnovo Rooftop Cargo Carrier | 1000D Oxford cloth | 20 cubic feet | 6 tie-down straps, 6 safety hooks | 51" L x 39" W x 17" H |
| Asinking Car Rooftop Cargo Car | 900D PVC tarpaulin | 21 cubic feet | Anti-slip mat, luggage lock, 6 security hooks, storage bag | 52" L x 40" W x 18" H |
| FIVKLEMNZ 30 Cubic Feet Waterp | 840D PVC | 30 cubic feet | Anti-slip mat, luggage lock, reinforced straps, door hooks, storage bag | 60" L x 43" W x 20" H |
| Asinking Car Rooftop Cargo Car | 900D abrasion-resistant PVC | 21 cubic feet | Cargo bag, non-slip mat, combination lock, door hooks, storage bag, user manual | 52" L x 40" W x 18" H |
| DUMOS Car Roof Bag Cargo Carri | Heavy-duty PVC | 20 cubic feet | Anti-slip mat, luggage lock, reinforced straps, door hooks, storage bag | — |
More Details on Our Top Picks
FIVKLEMNZ 21 Cubic Rooftop Cargo Carrier Waterproof Soft Car Roof Bag
This model earns the top spot because it solves the two problems that matter most with soft carriers: keeping water out and staying put at highway speeds. The welded seams and 840D PVC shell put it ahead of the MIDABAO on weatherproofing, while the ten reinforced straps and six door hooks give it more attachment redundancy than the WORKPRO. FIVKLEMNZ also publishes exact dimensions (52 x 40 x 18 inches), which the otherwise solid 21-cubic-foot Car Rooftop Cargo Carrier Bag omits — knowing the footprint before you buy prevents the classic mistake of a bag that hangs over the roof edges. The 12-month warranty is another differentiator in a category where most bags ship with no coverage at all. The tradeoff: a few owners report strap wear over time, and first-time installers should budget twenty minutes to get the tension right.
Pros:- Welded seams and 840D PVC deliver reliable waterproofing
- Published dimensions take the guesswork out of roof fit
- 10 straps plus 6 door hooks for secure attachment
- 12-month warranty, rare in this category
Cons:- Strap durability complaints from some long-term users
- Installation has a learning curve for first-timers
Best for: Families who want maximum capacity and weatherproofing confidence for long road trips in unpredictable weather
Not ideal for: Impatient installers who want a grab-and-go setup — tensioning ten straps correctly takes practice
- Material:840D PVC
- Capacity:21 cubic feet
- Dimensions:52 x 40 x 18 inches
- Straps:10 reinforced
- Door Hooks:6
- Includes:Anti-slip mat, luggage lock, straps, door hooks, storage bag
- Warranty:12 months
Our verdict“If you only want to buy one bag and forget about it, this is the most complete package for the money.”
Sailnovo Car Rooftop Cargo Carrier 21 Cubic Feet Waterproof Soft Roof Bag
The Sailnovo’s claim to fame is its 1000D PVC tarpaulin — a step up in denier from the 840D fabric used by both the FIVKLEMNZ and the WORKPRO. Thicker material translates directly to better puncture and abrasion resistance, which matters if your route involves gravel roads or low tree branches. It matches the FIVKLEMNZ on the practical kit (anti-slip mat, six hooks, ten straps, lock) while carrying the same 21-cubic-foot load for up to six people. Where it loses ground is compatibility: Sailnovo explicitly warns against use on vans without roof racks and vehicles with sunroofs, a narrower envelope than the FIVKLEMNZ’s true universal fit. Some installs also require lifting door weatherstripping, which can test your patience — and your seal’s integrity — on certain models.
Pros:- 1000D military-grade tarpaulin is the toughest fabric in this batch
- Full accessory kit rivals the FIVKLEMNZ
- Handles luggage for up to six people
- Security lock included
Cons:- Not compatible with sunroof vehicles or rackless vans
- Installation may require lifting door weatherstripping
Best for: Campers and off-highway travelers who need thicker fabric that shrugs off rough conditions
Not ideal for: Sunroof owners and rackless van drivers — the compatibility exclusions rule them out entirely
- Material:1000D PVC tarpaulin
- Capacity:21 cubic feet
- Dimensions:51.9 x 39.4 x 16.9 inches
- Compatibility:Most vehicles with/without roof racks (no sunroofs)
- Straps:10 reinforced
- Door Hooks:6
- Includes:Anti-slip mat, door hooks, straps, lock, storage bag
Our verdict“Pick this over the FIVKLEMNZ when durability matters more than universal compatibility.”
WORKPRO Rooftop Cargo Carrier Bag, 21 Cubic Feet Waterproof Car Roof Bag
The WORKPRO is the only bag in this lineup with reflective safety strips, a small detail that becomes genuinely useful if you load up after dark or park on the roadside — other drivers can see your cargo. Otherwise it matches the FIVKLEMNZ closely: same 840D PVC, same 21 cubic feet, same ten-strap, six-hook attachment scheme, at 52 x 40 x 17 inches. It lacks the FIVKLEMNZ’s 12-month warranty and welded-seam construction, so waterproofing confidence is slightly lower in sustained downpours. The reflective strips and anti-slip mat round out a kit that leans toward practicality rather than raw toughness. Note that WORKPRO’s own documentation warns that incorrectly routed straps can tear the fabric — an honest admission that installation quality determines longevity here more than with the Sailnovo’s thicker shell.
Pros:- Reflective strips improve visibility in low light
- Same 21-cubic-foot capacity and strap count as category leaders
- Anti-slip mat included
- Fits vehicles with or without racks
Cons:- No warranty coverage stated
- Strap misrouting can tear fabric or cause leaks
Best for: Night-trip drivers and early risers who value visibility extras alongside solid all-around performance
Not ideal for: Buyers facing severe weather regularly — a soft 840D shell without welded seams is not a hard-box substitute
- Material:840D PVC
- Capacity:21 cubic feet
- Dimensions:52 x 40 x 17 inches
- Straps:10 reinforced adjustable
- Safety Features:Reflective strips
- Includes:6 safety hooks, 2 reinforced straps, storage bag, user manual
Our verdict“A well-matched alternative to the FIVKLEMNZ with a safety edge, as long as you install it carefully.”
Car Rooftop Cargo Carrier Bag, 21 Cubic Feet, Waterproof, Heavy Duty 840D
What separates this bag from the pack isn’t the fabric — it’s standard 840D PVC, same as the WORKPRO — but the completeness of the bundle: anti-slip mat, door hooks, straps, a storage bag, and a lock, all in the box. That makes it a sensible pick for first-time buyers who don’t want to shop for accessories separately. Compared with the FIVKLEMNZ, the big gap is transparency: this listing provides no dimensions, so you’re trusting that 21 cubic feet fits your roof’s length and width. Reinforced seams and a waterproof zipper give it credible weather resistance, but the thin review history means long-term durability is unproven. If you want a one-click purchase with everything included, that tradeoff may be acceptable; if you want certainty, buy the FIVKLEMNZ with its published specs.
Pros:- Complete kit: mat, hooks, straps, lock, and storage bag included
- Reinforced seams resist tearing under load
- Waterproof zipper adds a second line of defense
- Installs with or without a roof rack
Cons:- No dimensions listed — fit cannot be verified before purchase
- Limited long-term durability feedback from owners
Best for: First-time roof-bag buyers who want every accessory in one box without extra purchases
Not ideal for: Owners of shorter roofs — no published dimensions means real fitment risk
- Material:840D abrasion-resistant PVC
- Capacity:21 cubic feet
- Waterproof:Yes, with waterproof zipper
- Dimensions:Not specified
- Includes:Anti-slip mat, door hooks, straps, lock, storage bag
- Color:Black
Our verdict“A convenient all-in-one starter kit, but measure your roof and buy carefully given the missing dimensions.”
MIDABAO 20 Cubic Feet Waterproof Car Roof Top Carrier – Cargo Roof Bag with Anti Slip Mat and Racks (Optional)
The MIDABAO trades a cubic foot of capacity and some refinement for a lower price point, making it the budget entry of this batch. Its PVC-coated fabric handles rain respectably, but it’s a lighter construction than the 840D shells on the FIVKLEMNZ or WORKPRO — expect it to protect through a storm, not through years of abuse. The malleable design is a genuine plus: it folds down smaller than stiffer bags, which matters if trunk space for the bag itself is limited between trips. Unlike the FIVKLEMNZ’s ten-strap setup, the MIDABAO’s simpler strap arrangement means less redundancy, and the product itself suggests adding racks for optimal security. At 51.1 x 39 x 17 inches, the published dimensions beat the unnamed 21-cubic-foot bag on transparency. For occasional vacation use, this is a smart spend; for frequent haulers, step up.
Pros:- Lowest-cost entry in this lineup
- PVC coating holds up in heavy rain
- Folds compactly for storage between trips
- Published dimensions confirm fit before buying
Cons:- Lighter fabric than 840D competitors
- Fewer straps and less attachment redundancy
- Manufacturer recommends racks for best security
Best for: Occasional road-trippers who need cheap extra cargo space a few weekends a year
Not ideal for: Frequent or rough-terrain users — lighter fabric and fewer straps won’t hold up to constant use
- Material:PVC-coated fabric
- Capacity:20 cubic feet
- Dimensions:51.1 x 39 x 17 inches
- Includes:Anti-slip mat, mounting straps
- Rack Options:Racks available as optional add-on
- Fit:All cars with or without roof rack
Our verdict“The right choice for infrequent travelers who want occasional capacity without paying for durability they won’t use.”
Asinking Car Rooftop Cargo Carrier Bag, 20 Cubic Feet
Families who consistently overflow the trunk will appreciate what this Asinking bag does that smaller options can’t: 20 cubic feet of genuinely weatherproof storage at a soft-carrier price. The IPX66 waterproof rating is a step above the vague “waterproof” claims on the FIVKLEMNZ 15 cubic foot bag, and the 900D double-coated tarpaulin feels built for highway abuse. Compared with the SportRack Vista XL hard box at 18 cubic feet, this bag holds slightly more, folds flat for storage, and costs far less — but you give up locking hard-shell security and aerodynamic efficiency. The included door hooks, lock, and anti-slip mat mean rackless sedans aren’t left out. The tradeoff: first-time installation takes patience, and those straps need checking at every fuel stop.
Pros:- Genuine IPX66 waterproofing with 900D double-coated tarpaulin
- 20 cubic feet rivals smaller hard boxes at a fraction of the price
- Works with or without roof racks thanks to included door hooks
- Aerodynamic shape cuts wind noise versus boxier soft bags
Cons:- Straps and buckles need frequent re-checking to stay secure
- First-time installation has a learning curve
Best for: Families with rackless sedans or hatchbacks who need maximum soft storage for long road trips
Not ideal for: Buyers who want set-and-forget security — soft bags require strap checks and offer less theft protection than a locking hard box like the Thule Pulse 2 L
- Capacity:20 cubic feet
- Waterproof Rating:IPX66
- Material:900D double-coated abrasion-resistant PVC laminated tarpaulin
- Dimensions:40 L x 52 W inches
- Includes:Non-slip mat, door hooks, combination lock, storage bag, user manual
- Compatibility:All vehicle types including SUVs, sedans, hatchbacks, pickups
- Warranty:2 years
Our verdict“The pick if you want near-hard-box capacity with soft-bag price and packability.”
SportRack Vista XL Rear Opening Cargo Box
Hard boxes usually cost two to three times a soft bag, so the Vista XL’s price-to-capacity ratio is its whole argument. You get 18 cubic feet of lockable, weather-sealed ABS storage — more volume than the Thule Pulse 2 L — plus tool-free mounting that clicks onto most factory crossbars without hardware fiddling. The rear-opening lid is the smart design choice here: unlike the Thule’s dual-side access, you load and unload from behind the car, which keeps gear away from roadside traffic. The UV-resistant ABS shell shrugs off weather that would soak through a lesser zipper on the Asinking bag. Be realistic about downsides: 100 pounds of load ceiling is modest, the box is awkward for one person to hoist onto a roof, and you’ll need to verify your crossbar spacing fits the 23 5/8–29 3/4 inch range before buying.
Pros:- Lockable hard shell protects gear from weather and theft
- Rear opening keeps loading away from traffic-side doors
- Tool-free mounting fits most factory rack systems
- 18 cubic feet beats the pricier Thule Pulse 2 L on volume
Cons:- Heavy and awkward for a single person to mount and remove
- 100 lb max load capacity is limiting for dense cargo
Best for: Budget-minded buyers who want hard-shell security and weather protection without Thule-level pricing
Not ideal for: Vehicles with crossbar spacing outside the 60–75.5 cm range, or anyone unable to lift a bulky empty box onto a roof alone
- Capacity:18 cubic feet (510 L)
- Material:UV-resistant ABS
- Dimensions:63 x 38 x 19 in / 160 x 96.5 x 48 cm
- Max Weight Capacity:100 pounds (45 kg)
- Crossbar Spacing:23 5/8 – 29 3/4 in (60 – 75.5 cm)
- Access:Rear opening
- Mounting:Tool-free
Our verdict“The most sensible entry point into hard-box ownership if your crossbars match.”
Thule Pulse 2 L Roof Mounted Cargo Box
Thule’s reputation isn’t free, and the Pulse 2 L is where you decide whether build quality and access convenience justify paying over a soft bag like the Asinking. The answer depends on how often you’ll use it. The dual-side opening is a genuine daily-use advantage over the SportRack Vista XL’s rear-only access — you reach gear from either side of the car without walking around, which matters in tight parking spots. The tool-free mounting with torque indicator takes the guesswork out of whether the box is actually secure, something no strap-based bag can match. ASA-ABS construction handles sun and cold without the brittleness cheaper boxes develop. Against soft carriers, you lose fold-flat storage and pay a real premium, and at 16 cubic feet it holds slightly less than both the Asinking bag and the Vista XL. This is the buy-it-once option.
Pros:- Dual-side opening beats rear-only boxes for convenience in tight spots
- Torque-indicator mounting confirms secure attachment visually
- Weather-resistant ASA-ABS shell built for years of UV and cold exposure
- 75 kg load capacity exceeds most competitors in this class
Cons:- Premium price well above soft bags and the SportRack Vista XL
- Cannot fold or store flat like a soft carrier
Best for: Frequent travelers and winter-sports families who want a durable, dual-access box that lasts many seasons
Not ideal for: Occasional road-trippers and small-garage owners — the price and permanent bulk outweigh the convenience for once-a-year use
- Capacity:16 cubic feet
- Load Capacity:75 kg (165 lbs)
- Material:ASA-ABS plastic
- Opening:Dual-side
- Mounting:Tool-free with torque indicator
- Brand:Thule
- Model Number:610750
Our verdict“Buy it if you roof-haul several times a year and want the last cargo box you’ll need.”
Car Rooftop Cargo Carrier Bag, 15 Cubic Feet Waterproof Heavy Duty 840D
When the goal is simply getting gear onto the roof for as little money as possible, this 15 cubic foot 840D bag gets the job done without the frills. It shares the same 840D PVC fabric and welded-seam approach as the FIVKLEMNZ 15 cubic foot carrier, and like that bag it includes the full accessory kit — anti-slip mat, door hooks, straps, lock, and storage bag — so there are no hidden add-on costs. Where it trails the FIVKLEMNZ is transparency: no published dimensions, which matters if you’re trying to confirm it clears your antenna or sunroof. Capacity is the real differentiator versus the Asinking 20 cubic footer — you sacrifice five cubic feet, but for couples or solo travelers that’s plenty for a tent, sleeping bags, and a duffel. Reinforced seams and waterproof zippers held up as the value play here; just budget extra time for a careful first install.
Pros:- Complete accessory kit included at a low price point
- 840D PVC with reinforced seams and waterproof zipper handles real weather
- Fits vehicles with or without roof racks
- Right-sized 15 cubic feet for smaller loads and better fuel economy
Cons:- No published dimensions complicate fit verification
- First-time installation takes trial and error
Best for: Budget-conscious couples or solo travelers who need occasional extra storage without accessory-buying surprises
Not ideal for: Buyers who need to verify exact roof fit beforehand — the missing dimensions make pre-purchase planning a guess
- Material:840D abrasion-resistant PVC fabric
- Capacity:15 cubic feet
- Waterproof:Yes, with waterproof zipper and reinforced seams
- Includes:Anti-slip mat, door hooks, straps, luggage lock, storage bag
- Rack Compatibility:All vehicles with or without racks
- Warranty:2 years
Our verdict“The cheapest credible way to add roof storage, if you can live with the sizing unknowns.”
FIVKLEMNZ Car Rooftop Cargo Carrier Waterproof Roof Bag
This FIVKLEMNZ bag earns its spot by being the most complete mid-size package in the lineup. Unlike the budget 15 cubic foot bag, it publishes real dimensions — 46 x 34 x 17 inches — so you can confirm fit before ordering, which alone justifies its slight premium. The 840D PVC with welded seams keeps contents dry through sustained rain and snow, and the reinforced straps are a meaningful upgrade over standard webbing when you’re cruising at highway speeds for hours. Like the Asinking 20 cubic footer, it installs on any vehicle with or without a rack, but its smaller footprint leaves roof real estate free — or suits compact cars where a 20+ cubic foot bag would overhang awkwardly. The honest drawbacks: it’s bulky when folded away versus truly compressible bags, and skip the anti-slip mat at 70 mph and you’ll hear about it. Re-tighten straps after the first half hour of driving.
Pros:- Published dimensions (46 x 34 x 17 in) enable confident fit checking
- Welded seams and 840D PVC keep gear dry in heavy rain or snow
- Reinforced straps resist stretching on long highway drives
- Includes full accessory kit: mat, lock, hooks, and storage bag
Cons:- Bulky to store when not in use compared with softer-folding bags
- Requires careful securing to prevent shifting at high speeds
Best for: Compact-car owners and weekend campers who want verified dimensions and a complete kit at moderate capacity
Not ideal for: Large families needing to haul maximum volume — the 15 cubic foot ceiling is tight next to the Asinking 20
- Material:840D PVC
- Capacity:15 cubic feet
- Dimensions:46 x 34 x 17 inches
- Seams:Welded for waterproofing
- Includes:Anti-slip mat, luggage lock, reinforced straps, door hooks, storage bag
- Fits:All vehicles with or without roof rack
Our verdict“The smart middle choice — verified sizing and solid weatherproofing without paying for capacity you won’t use.”
Sailnovo Rooftop Cargo Carrier Roof Bag, 20 Cuft
Sailnovo’s 20 cubic foot bag is the value play in this lineup. Its 1000D Oxford cloth is thicker than what most budget bags use, and the six-strap, six-hook attachment system means it stays put whether your car has a rack or not. Compared with the DUMOS, you give up the included anti-slip mat and lock, but you pay less for similar carrying volume. The tradeoff: water resistance here is repellent, not fully waterproof — unlike the welded-seam FIVKLEMNZ 30 Cu Ft — so pack soft goods in liners if heavy rain is likely. Note the sunroof restriction; the straps route through the cabin on rackless cars, and a sunroof makes that impossible.
Pros:- 20 cubic feet of genuine capacity for suitcases and camping gear
- Thicker 1000D fabric than typical budget bags
- Works with or without a roof rack
- Six straps and hooks keep the bag stable at highway speeds
Cons:- Water-repellent rather than fully waterproof construction
- Not compatible with sunroof vehicles
- Can overhang small cars if not filled thoughtfully
Best for: Budget-minded travelers who need solid capacity for occasional trips and don’t face constant downpours
Not ideal for: Owners of sunroof-equipped vehicles, or anyone hauling electronics through rainy climates
- Capacity:20 cubic feet
- Dimensions:51″ L x 39″ W x 17″ H
- Material:1000D Oxford cloth
- Weather Resistance:Water-repellent
- Rack Required:No — fits cars with or without racks
- Includes:6 tie-down straps, 6 safety hooks
- Sunroof Compatibility:Not recommended
Our verdict“The smart pick if you want maximum cargo volume per dollar and your trips rarely involve sustained rain.”
Asinking Car Rooftop Cargo Carrier Bag 21 Cubic Feet
What separates this Asinking from the nearly identical Asinking 21 Cu Ft (B0CZP1HLSW) is the completeness of the kit: anti-slip mat, luggage lock, six security hooks, and a storage bag all come in the box. That bundle matters because an anti-slip mat is the single cheapest way to prevent paint scuffing and bag drift — something the Sailnovo omits entirely. The 900D PVC tarpaulin shell is fully waterproof, a step up from fabric bags in this price band. The tradeoff is installation friction: getting a taut, quiet fit on rackless vehicles takes patience, and the 21-cubic-foot footprint runs bulky on compact cars.
Pros:- Complete kit with anti-slip mat, lock, hooks, and storage bag included
- Fully waterproof 900D PVC tarpaulin construction
- Universal fit with or without a roof rack
- Folds down compactly between trips
Cons:- Achieving a secure, rattle-free install can be frustrating on some vehicles
- Oversized footprint for compact cars
- Bulky and heavy to heft onto the roof when fully loaded
Best for: First-time roof bag buyers who want every accessory included so nothing extra needs to be purchased
Not ideal for: Drivers of small hatchbacks who will find the footprint oversized and awkward to cinch down
- Capacity:21 cubic feet
- Dimensions:52″ L x 40″ W x 18″ H
- Material:900D PVC tarpaulin
- Waterproof:Yes
- Rack Required:No — fits all cars and SUVs
- Includes:Anti-slip mat, luggage lock, 6 security hooks, storage bag
Our verdict“Buy this if you’d rather get the full accessory package up front than piece together a mat, lock, and hooks separately.”
FIVKLEMNZ 30 Cubic Feet Waterproof Rooftop Cargo Carrier
At 30 cubic feet, this FIVKLEMNZ is the capacity champion of this batch — roughly 50% more volume than the 21-cubic-foot Asinking bags — which means it can swallow a family of five’s luggage plus camping gear in one load. The 10 reinforced straps (versus the usual six) and welded seams give it structural confidence the Sailnovo can’t match under load. But big capacity cuts both ways: this bag is physically hard to mount solo, and its 60-inch length can overhang smaller roofs alarmingly. If you drive a midsize or larger SUV, that’s a non-issue; on a sedan, size down to a 20–21 cubic foot option.
Pros:- Largest capacity in this batch at 30 cubic feet
- 10 reinforced straps for superior load stability
- Welded waterproof seams keep contents dry
- 12-month warranty and full accessory kit included
Cons:- Heavy and awkward to install alone, especially when loaded
- Too large for small vehicles
- Relatively new product with limited long-term review history
Best for: Owners of SUVs and minivans hauling gear for four or more people on long road trips
Not ideal for: Sedan and small-crossover owners — the footprint overwhelms smaller roofs and gets unwieldy fast
- Capacity:30 cubic feet
- Dimensions:60″ L x 43″ W x 20″ H
- Material:840D PVC
- Reinforced Straps:10
- Door Hooks:6
- Includes:Anti-slip mat, luggage lock, reinforced straps, door hooks, storage bag
- Warranty:12 months
Our verdict“The clear choice when maximum volume matters and your vehicle has the roof real estate to handle it.”
Asinking Car Rooftop Cargo Carrier Bag – 100% Waterproof, 21 Cubic Feet
This is Asinking’s abrasion-resistant 900D PVC variant, and the tougher shell is the whole story. Where the standard Asinking 21 Cu Ft (B0CFXW5K5L) covers the essentials, this version emphasizes rip-proof seams and reinforced construction aimed at multi-day highway trips where constant wind buffeting punishes weaker bags. The included combination lock and non-slip mat put it at feature parity with its sibling, and ahead of the Sailnovo. The honest tradeoff: rugged material means a stiffer bag that’s harder to fold compactly and takes more care to strap down tight enough to avoid flapping at speed.
Pros:- Abrasion-resistant 900D PVC built for sustained highway use
- 100% waterproof and rip-proof with reinforced seams
- Combination lock and non-slip mat included
- Installs on any roof type, rack or no rack
Cons:- Stiff material makes it bulky to store between trips
- Demands careful strap tension to prevent movement at high speeds
Best for: Road-trippers logging long highway miles who need a bag that survives sustained wind exposure and abrasion
Not ideal for: Buyers with minimal storage space at home, since the stiff fabric doesn’t pack down as small as softer bags
- Capacity:21 cubic feet
- Dimensions:52″ L x 40″ W x 18″ H
- Material:900D abrasion-resistant PVC
- Waterproof:Yes — 100%
- Rack Required:No — fits all vehicles
- Includes:Cargo bag, non-slip mat, combination lock, door hooks, storage bag, user manual
Our verdict“Pick this over the standard Asinking when your trips are long, fast, and frequent enough to justify the tougher shell.”
DUMOS Car Roof Bag Cargo Carrier Waterproof 20 Cubic Feet
The DUMOS hits the broadest sweet spot in this batch: full waterproofing, tearproof PVC, a lock, anti-slip mat, and 20 cubic feet at a footprint friendlier to midsize vehicles than the oversized FIVKLEMNZ 30 Cu Ft. Compared with the Sailnovo 20 Cu Ft, you gain genuine waterproofing (not just water repellency) plus the anti-slip mat the Sailnovo lacks — meaningful upgrades for the same capacity class. The compromise is polish rather than performance: fit adjustments vary by vehicle, first-time installation has a learning curve, and warranty details are thin, which matters if you’re the type who values long-term backing like FIVKLEMNZ’s 12-month coverage.
Pros:- 100% waterproof and tearproof PVC handles rain and snow reliably
- Includes lock, anti-slip mat, hooks, and storage bag
- 20 cubic feet fits most vehicles without overhang
- Folds flat for garage or trunk storage
Cons:- Installation technique needs tweaking across different roof shapes
- Limited or unclear warranty coverage
- Slightly steeper learning curve than premium rivals
Best for: First-time buyers with sedans or crossovers who want a balanced, full-featured bag without oversizing their roof
Not ideal for: Buyers who prioritize strong warranty support or need more than 20 cubic feet for large groups
- Capacity:20 cubic feet
- Material:Heavy-duty PVC
- Waterproof:Yes — 100%
- Tear Resistance:Tearproof construction
- Rack Required:No — fits most vehicles with or without racks
- Includes:Anti-slip mat, luggage lock, reinforced straps, door hooks, storage bag
Our verdict“A dependable, right-sized first roof bag that trades warranty strength for a complete feature set at a fair price.”
How We Picked
My ranking logic starts with capacity relative to vehicle type, because a 30 cubic foot bag on a sedan roof is a safety problem, not a bonus. From there I weighed weather protection — welded seams, zipper flaps, and whether the manufacturer includes a rain cover — since wet luggage is the number one complaint in this category. Third, I evaluated mounting hardware: bags that ship with anti-slip mats, protective mats, and door-frame clips scored higher than bare-strap versions, especially for buyers without roof racks. Fourth, I looked at material durability, favoring 840D or heavier fabric over thinner alternatives that tear at highway speeds. Finally, I compared value per cubic foot and storage footprint, since most buyers use these carriers a few times a year and appreciate one that folds into a carry bag.
The hard-shell options — the Thule Pulse 2 L and SportRack Vista XL — were judged on different criteria: locking security, aerodynamics, opening direction, and how they compare on price. That’s why they occupy the premium slots rather than being ranked against $60 bags on price alone. The result is a list ordered from the most versatile all-around picks down to niche options for specific vehicle sizes and budgets.
Factors to Consider When Choosing Car Roof Cargo Carriers
Before clicking buy on any of the 15 carriers above, step back and match the purchase to your actual vehicle, rack situation, and trip habits. These are the factors that most often separate a satisfying purchase from a returned box.Measure Your Roof Before You Measure the Carrier
The most common mistake in this category is buying capacity your roof can’t safely support. A 21 cubic foot bag is roughly the practical maximum for most sedans and compact SUVs, while 30 cubic foot options like the FIVKLEMNZ XL really belong on minivans and full-size SUVs with long, flat rooflines. Check your vehicle’s dynamic roof load rating (usually listed in the owner’s manual, often 75–165 lbs including the rack itself) before choosing a size. Also account for the carrier’s footprint — a bag that overhangs the windshield or rear hatch creates lift and blocks your view. If you park in a garage, measure clearance with a loaded carrier before you commit; soft bags can be unloaded, but a mounted hard box adds nine to eleven inches permanently until you remove it.
Rack vs. No Rack Changes Everything
Every product in this roundup works on a vehicle with a rack, but only some work safely without one. Rack-free mounting relies on straps that clip into the door frames, and that method demands an anti-slip mat underneath to keep the bag from shifting — the reason I favored bundles like the MIDABAO and DUMOS that include mats. If your car has no rails at all, accept that you’ll pay slightly more for a complete kit rather than improvising hardware. If you have crossbars, nearly any soft bag works, and you can prioritize fabric quality and waterproofing instead. Hard boxes like the Thule Pulse 2 L and SportRack Vista XL require crossbars, full stop — there’s no safe workaround, so budget for a rack system if you don’t have one.
Waterproofing Claims Deserve Skepticism
Almost every bag in this category says “waterproof,” but real-world performance depends on construction details. Look for welded or heat-sealed seams rather than stitched seams covered in tape, and a storm flap over the zipper — the zipper is where nearly all leaks happen. Reviews of the Asinking and FIVKLEMNZ models confirm their flap-plus-welded-seam design holds up in sustained rain, while thinner budget bags often let water wick through stitching after hours on the highway. A practical habit regardless of brand: line the inside with a heavy trash bag or pack clothes in dry bags. Hard shells sidestep the issue entirely, which is part of what you’re paying for with the Thule. If your trips involve highway speeds through storms, that premium buys genuine peace of mind.
Soft Bag vs. Hard Shell: The Real Cost Difference
A soft bag costs $50–$150; a quality hard box runs $400–$750. That gap buys you three things: theft resistance via locks, rigid protection for fragile gear, and better aerodynamics that can offset some cost in fuel savings over years of use. What it costs you is storage space — a soft bag folds into a duffel you can keep in a closet, while a box occupies a garage wall or ceiling hoist year-round. Soft bags also let you overstuff somewhat, since fabric flexes; hard boxes have a fixed volume you can’t cheat. For once-a-year vacationers, the soft bag math wins easily. For frequent road-trippers carrying skis, camping gear, or anything valuable left on the car overnight, the hard shell pays for itself in convenience and security.
Don’t Ignore Aerodynamics and Fuel Economy
A loaded roof carrier can cut fuel economy by 10–25% at highway speeds, and shape matters more than most buyers realize. Squat soft bags create drag; a streamlined low-profile box like the Thule Pulse 2 L slips through the air with less penalty. You can mitigate soft-bag drag by packing evenly, cinching compression straps tightly, and keeping the bag’s profile low and smooth. Also consider wind noise: loose straps on soft bags flap audibly at 60+ mph, so wrap excess strap length or tuck it under the buckles. Remove the carrier as soon as your trip ends — driving around town with an empty box or bag wastes fuel every mile and exposes the carrier to unnecessary sun damage.
Accessories Are Where Budget Brands Cut Corners
The price difference between a $55 bag and a $90 bag often comes down to what’s in the box. Premium bundles include a protective mat, spare straps, a compression sack, and a storage bag — items that cost $40+ if purchased separately and that directly affect mounting safety and longevity. The 840D-fabric bags across this list (the 21 and 15 cubic foot models) justify their slightly higher prices with heavier material and more complete kits. Cheaper listings sometimes ship with thin straps that fray after a season or no mat at all, forcing improvised solutions that scratch your paint. Before choosing on price alone, tally the total cost of ownership including those add-ons. A “cheap” bag that needs $50 of accessories isn’t cheaper.
Frequently Asked Questions
Can I use a rooftop cargo carrier if my car has no roof rack?
Yes, but only soft bags designed for rack-free mounting. These use straps that hook into your door frames, and they absolutely require an anti-slip mat between the bag and your roof to prevent shifting and paint damage — that’s why bundles like the MIDABAO 20 cu ft and DUMOS include one. Check that your door frames can accept the clips without interfering with side-curtain airbag sensors; most modern cars handle this fine, but your owner’s manual will say. Keep speeds moderate and re-tighten straps at every stop, because frame-clip mounting loosens gradually as the bag settles. Hard boxes like the Thule Pulse 2 L and SportRack Vista XL cannot be mounted without crossbars, so rack-free buyers should stick to bags.
How much can I actually fit in a 15, 20, or 21 cubic foot carrier?
As a working rule, one cubic foot holds roughly one carry-on suitcase’s worth of gear. A 15 cubic foot bag fits about 3–4 medium duffels — enough for a couple’s long weekend or a family’s soft goods. A 20–21 cubic foot bag holds 4–5 large suitcases plus sleeping bags, which covers most family road trips. The 30 cubic foot FIVKLEMNZ swallows a full campsite but exceeds what sedans should carry. Remember that weight, not volume, is usually the real limit: your roof’s dynamic load rating (often 75–165 lbs) includes the carrier itself, so a 100-lb bag of cargo on a 110-lb-rated roof is already over. Pack heavy items inside the car and reserve the roof for light, bulky items.
Are soft cargo bags really waterproof, or do I need to bag my stuff anyway?
Most quality bags are water-resistant to highly water-resistant, with the zipper as the weak point even on the best models. Bags with welded seams and full-length storm flaps — the Asinking 21 cu ft and FIVKLEMNZ designs — handle sustained rain well, but driving rain at 70 mph for hours can still force moisture past a zipper. My standing advice: put clothing and electronics in trash compactor bags or dry bags inside the carrier regardless of brand. This costs almost nothing and removes all doubt. Hard boxes are the only genuinely waterproof option in this lineup, which is one of the main reasons they command premium prices.
Is a hard cargo box worth the extra money over a soft bag?
It depends on how often you travel and what you carry. If you road-trip several times a year, carry gear that shouldn’t get crushed (skis, cameras, camping stoves), or ever leave the carrier on the car overnight, a lockable hard box like the Thule Pulse 2 L justifies itself through security and peace of mind. It also handles better aerodynamically, which trims fuel costs over years of use. But if you take two trips a year with clothes and beach gear, a $60–$100 soft bag does the same job and stores in a closet afterward instead of consuming garage space. A common middle path: buy a quality mid-range bag now, and upgrade to a box only if you find yourself using it constantly. Just don’t buy a hard box for occasional use — that’s paying premium prices for capability you won’t touch.
Will a roof cargo carrier damage my car’s paint or roof?
It can, but damage is almost always preventable with two habits. First, never mount a soft bag directly on bare paint — use the included protective or anti-slip mat, or order one separately if your bag doesn’t include it. The mat prevents both scratches from grit trapped under the bag and shifting during driving. Second, clean the roof before mounting; a single grain of sand under a vibrating bag can scuff clear coat over a long drive. With rack-mounted bags and boxes, the carrier sits above the paint entirely, so the risk drops to nearly zero. After the trip, wipe down the roof where straps contacted the body, since road grime under straps can dull the finish if left for weeks.
Conclusion
The right choice comes down to how you travel. For most buyers, the FIVKLEMNZ 21 cubic foot waterproof bag is my best overall pick — it balances capacity, weather protection, and a complete accessory kit at a price that doesn’t hurt. The Asinking 21 cubic foot carrier is nearly identical in value and a strong alternate if it’s cheaper the day you shop. Best value goes to the 15 cubic foot 840D bag: same rugged fabric as larger models, ideal size for couples and sedans, and the lowest total cost of ownership in the lineup. On the premium end, the Thule Pulse 2 L is the best hard shell for frequent travelers who want locking security and all-weather protection, while the SportRack Vista XL is the smarter premium buy if rear access matters more than brand pedigree. First-timers and rack-free cars should start with the MIDABAO 20 cubic foot kit, since its included anti-slip mat and optional racks remove every beginner guesswork point. And for minivan and full-size SUV owners hauling a full campsite, the FIVKLEMNZ 30 cubic footer is the only option here big enough. Match the carrier to your roof, your rack, and your trip frequency — the best car roof cargo carrier is the one you’ll actually use more than once a year.
