Mockins or Sailnovo? Roof Cargo Boxes Compared in 2026
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When you compare the mockins vs sailnovo roof cargo box, you see two soft-shell options for extra storage. Both brands offer waterproof designs that fit cars without racks. The main difference is size. The Mockins model provides 40 cubic feet of space, while the Sailnovo offers 21 cubic feet. You need to decide if you need maximum volume or a lighter, more compact solution for your vehicle roof.
Key differences
| Aspect | Mockins 40 cu ft XXL Soft-Shell Roof Bag | Sailnovo 21 cu ft Soft Roof Bag |
|---|---|---|
| Capacity | 40 cu ft | 21 cu ft |
| Dimensions | 72 x 48 x 20 in | 9.84 x 7.09 x 13.8 in |
| Weight | 15.7 pounds | 8.16 pounds |
| Included Accessories | Straps, hooks, mat, lock, carry bag | not listed |
Which one should you choose?
Choose Mockins 40 cu ft XXL Soft-Shell Roof Bag if
- You need to transport large items like multiple suitcases or camping gear.
- You want a complete kit with hooks and a protective mat included.
- You have a larger vehicle roof and need maximum volume.
Choose Sailnovo 21 cu ft Soft Roof Bag if
- You prefer a lighter bag that is easier to handle.
- You have limited roof space or a smaller car.
- You want a compact option for occasional or light loads.
Verdict: Choose the Mockins if you prioritize capacity and included accessories for heavy loads. Pick the Sailnovo if you value a lighter weight and smaller footprint for easier handling. Both provide waterproof protection for your gear.
Mockins vs Sailnovo Roof Bag
Capacity
The Mockins bag offers 40 cubic feet of storage space. This large volume helps you haul bulky items like suitcases and sleeping bags. The Sailnovo model provides 21 cubic feet. This smaller size suits lighter loads or shorter trips. You should choose the Mockins if you need maximum room. The Sailnovo works well for minimal gear. The difference in volume is significant for your packing plans.
Dimensions
Mockins measures 72 inches in length, 48 inches in width, and 20 inches in height. These external dimensions allow it to span most car roofs. Sailnovo lists dimensions of 9.84 x 7.09 x 13.8 inches. This data likely refers to the packed size, not the installed footprint. You must check the installed footprint on the product page for Sailnovo. The Mockins size is clearly defined for installation space planning.
Weight
The Mockins soft-shell carrier weighs 15.7 pounds. This weight is manageable for most adults to lift and secure. The Sailnovo bag weighs 8.16 pounds. This lighter weight makes it easier to handle during installation. You might prefer the Sailnovo if lifting heavy items is difficult. The Mockins offers more stability due to its heavier build. Both weights are within safe handling limits for roof bags.
Water Resistance
Both brands claim waterproof protection for your gear. The Mockins uses abrasion-resistant vinyl and reinforced seams. It also includes waterproof zippers under a protective flap. This design aims to keep contents dry in heavy rain. Sailnovo lists waterproof resistance as a key spec. You should verify the specific materials and zipper details for the Sailnovo model. Both options provide basic weather protection for outdoor storage.
Included Accessories
The Mockins kit includes 3 buckle straps, 3 ratchet straps, 6 door hooks, 2 trunk hooks, a roof mat, and a combo lock. This comprehensive set helps secure the bag to cars without racks. The Sailnovo data does not list specific included accessories. You may need to purchase straps or hooks separately for the Sailnovo. The Mockins bundle provides all necessary tools for immediate use. Check the Sailnovo listing for included hardware details.
Warranty
Mockins backs its soft carrier with a 10-year limited warranty. This long coverage period suggests confidence in the product durability. The Sailnovo data does not mention a warranty period. You should check the Sailnovo product page for warranty terms. The Mockins warranty offers long-term peace of mind. This factor adds value to the overall purchase. Consider the warranty length when comparing long-term ownership costs.
Which roof cargo bag fits you
You need maximum storage for family trips
The Mockins bag provides 40 cubic feet of space. Its large dimensions of 72 by 48 inches allow you to carry bulky items like suitcases and sleeping bags. The soft-shell design expands to fit your needs. You get a comprehensive kit with straps and hooks for secure installation on various vehicles.
You prefer a compact bag for light loads
The Sailnovo model offers 21 cubic feet of capacity. It is smaller and lighter at 8.16 pounds. This size suits lighter loads or shorter trips where you do not need extra space. The compact dimensions make it easier to handle and store when not in use. It remains waterproof for all weather conditions.
You want a durable bag with a warranty
Mockins includes a 10-year limited warranty with this soft-shell carrier. The bag is crafted from abrasion-resistant vinyl with reinforced seams. This construction adds durability for long trips. You also receive a complete accessory kit. The included roof mat protects your vehicle. This option provides peace of mind for extended use.
The products compared
Mockins 40 cu ft XXL Soft-Shell Roof Bag
Best for: vehicles without roof racks needing high capacity
- Capacity
- 40 cu ft
- Shell Type
- Soft shell (vinyl)
- Water Resistance
- Waterproof
- Security
- Combo lock
- Installation
- Buckle/ratchet straps, door hooks
- Vehicle Compatibility
- With or without roof rack
View on Amazon: Mockins 40 cu ft XXL Soft-Shell Roof Bag Affiliate link
This soft-shell roof bag offers 40 cubic feet of storage, measuring 72 by 48 by 20 inches. It weighs 15.7 pounds and uses a waterproof vinyl shell with reinforced seams. The design fits vehicles with or without existing roof racks. You can secure it using buckle straps, ratchet straps, or door and trunk hooks. It includes a protective roof mat and a carry bag for storage.
Pros
- 40 cubic feet capacity for large loads
- Waterproof vinyl shell with reinforced seams
- Fits vehicles with or without roof racks
- Includes door hooks and trunk hooks for flexible mounting
Cons
- Soft-shell design offers less aerodynamic efficiency than hard shells
- No mention of integrated locking mechanisms for the main compartment
- Bulkier profile at 20 inches high compared to low-profile carriers
Good fit if
- You need extra storage for a single large trip
- Your vehicle lacks roof racks or crossbars
- You want to protect gear from rain during transit
Skip if
- You prioritize fuel efficiency from a low-profile design
- You need secure, integrated locking for the cargo area
- You require a rigid shell for high-speed highway stability
Verdict: Mockins 40 CuFt Soft-Shell Roof Bag provides ample space for vehicles without existing racks. It suits travelers who need flexible mounting options and weather protection for bulky items like sleeping bags.
Sailnovo 21 cu ft Soft Roof Bag
Best for: Cars without roof racks needing moderate storage
- Capacity
- 21 cubic feet
- Shell Type
- Soft Shell
- Water Resistance
- Waterproof
- Installation
- Tie-Down Strap
- Dimensions
- 9.84 x 7.09 x 13.8 in
- Vehicle Type
- Car
View on Amazon: Sailnovo 21 cu ft Soft Roof Bag Affiliate link
This Sailnovo roof bag offers 21 cubic feet of storage in a soft-shell design. It measures 7.09 inches wide and 13.8 inches high when packed. The unit weighs 8.16 pounds and uses tie-down straps for installation. It is waterproof and fits cars without roof racks. This option suits those needing flexible cargo space for smaller vehicles.
Pros
- 21 cubic feet capacity
- Waterproof construction
- Fits cars without roof racks
- Lightweight at 8.16 pounds
Cons
- Smaller capacity than the 40 CuFt Mockins option
- Soft-shell design offers less rigid protection
- Requires tie-down strap installation
Good fit if
- You drive a car without roof racks
- You need a lightweight, compact storage solution
- You want a waterproof bag for moderate loads
Skip if
- You require maximum rigid protection for gear
- You need more than 21 cubic feet of space
- You prefer hard-shell aesthetics
Verdict: Sailnovo 21 CuFt Soft-Shell Roof Bag fits drivers of cars without roof racks who need a lightweight, waterproof bag for moderate cargo loads.
Specifications side by side
| Spec | Mockins 40 cu ft XXL Soft-Shell Roof Bag | Sailnovo 21 cu ft Soft Roof Bag |
|---|---|---|
| Capacity | 40 cu ft | 21 cubic feet |
| Shell Type | Soft shell (vinyl) | Soft Shell |
| Water Resistance | Waterproof | Waterproof |
| Security | Combo lock | not stated |
| Installation | Buckle/ratchet straps, door hooks | Tie-Down Strap |
| Vehicle Compatibility | With or without roof rack | not stated |
| Dimensions | 72 x 48 x 20 in | 9.84 x 7.09 x 13.8 in |
| Recommended Use | Suitcases, sleeping bags | not stated |
| Vehicle Type | Car, SUV, Truck, Van | Car |
| Size | 40 Cubic Feet | 21 Cubic Feet |
| Mount Type | Roof Mount | Roof Mount |
| Weight | 15.7 pounds | 8.16 pounds |
| Color | Black/Orange | Black |
| Model | MA-RB-40BLK-89-V2 | Sailnovo5033-FR |
Frequently asked questions
Which roof bag is better for a car without racks?
Both brands work well for vehicles without existing roof racks. The Mockins model offers 40 cubic feet of space for larger loads. The Sailnovo option provides 21 cubic feet for moderate needs. You can choose based on how much cargo you typically transport. Both designs secure directly to your vehicle roof.
How heavy is the Mockins roof cargo bag?
The Mockins bag weighs 15.7 pounds. This weight supports its larger 40 cubic feet capacity. The soft-shell construction helps keep the unit manageable. You can handle it easily during installation. The weight is distributed across the bag's large footprint for stability.
What are the dimensions of the Sailnovo soft shell bag?
The Sailnovo bag measures 21 cubic feet in total volume. Its compact design fits cars without racks efficiently. The unit is lightweight at 8.16 pounds. This smaller size suits drivers who need moderate storage for shorter trips or lighter loads.
Can I use these bags on any car?
Both products are designed for cars without roof racks. They use a soft-shell design that mounts directly to the roof. The Mockins model is larger at 72 inches long. The Sailnovo model is more compact. Both provide weather protection for your cargo items.
Is the Mockins bag suitable for bulky items?
Yes, the Mockins bag is ideal for bulky items. It offers 40 cubic feet of space. The 72 by 48-inch footprint allows you to store large suitcases or sleeping bags. The soft-shell material conforms to the shape of your cargo for secure transport.
Does the Sailnovo bag have a specific model number?
The Sailnovo soft roof bag uses model number Sailnovo5033-FR. This identifier helps you find the exact product online. It is a 21 cubic feet unit. The black color helps it blend with most vehicle roofs. The model number ensures you get the correct size.
Which bag is lighter to carry?
The Sailnovo bag is lighter for carrying and storage. It weighs 8.16 pounds compared to the Mockins 15.7 pounds. This makes the Sailnovo easier to handle if you need to remove it frequently. Both are soft-shell designs that fold down when not in use.