Looking Beyond the Sailnovo 15 cu ft Waterproof? 6 Alternatives Worth a Look
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You might be searching for sailnovo 15 cu ft waterproof alternatives because this soft-shell bag has specific limits. The Sailnovo model offers 15 cubic feet of storage with waterproof zippers and double-seam technology. It fits bare roofs without permanent racks. Its compact folded dimensions of 14.2 by 9.45 by 7.48 inches make it easy to store. However, you may need more volume or a different shell type. Some drivers require rigid protection or larger capacities for family trips. Others prefer brands with different mounting kits or color options. This list covers 6 options that share similar soft-shell designs and roof-mount capabilities. We selected these products because their specifications overlap with the original Sailnovo bag. You will find options with capacities ranging from 21 to 40 cubic feet. All listed items are waterproof soft-shell carriers designed for vehicles without fixed roof racks. This guide helps you compare dimensions, weight, and material specs to find the right fit.
Our top pick: Sailnovo 15 cu ft Waterproof Roof Bag.
How each alternative compares
Sailnovo 21 cu ft Soft Roof Bag
The Sailnovo 21 cu ft Soft Roof Bag increases your storage capacity by 6 cubic feet compared to the 15 cu ft model. It retains the soft-shell design and waterproof construction, making it suitable for cars without roof rails. The folded dimensions are slightly different, measuring 13.8 by 9.84 by 7.09 inches. You gain more room for luggage while keeping the compact storage profile when not in use. This option works well if you need extra space but still prefer a flexible carrier that mounts easily. It sacrifices some aerodynamic efficiency for the added volume. Choose this if your current bag feels too small for longer trips.
Mockins 30 cu ft Soft-Shell Vinyl Roof Bag
The Mockins 30 cu ft Soft-Shell Vinyl Roof Bag doubles the capacity of the original Sailnovo model. It measures 60 by 43 by 20 inches when deployed, offering significant space for large gear. The vinyl material provides strong weather protection, similar to the double-seam technology in the 15 cu ft version. You get a much larger footprint, which requires a wider vehicle roof for safe mounting. The weight increases to 15.5 pounds, affecting fuel economy more than the lighter original. This bag suits families or travelers who prioritize capacity over aerodynamic efficiency. It is ideal if you frequently carry bulky items like camping equipment or sports gear.
Rooftop Ranger 21 cu ft Soft Shell Cargo Carrier
The Rooftop Ranger 21 cu ft Soft Shell Cargo Carrier offers 6 more cubic feet than the Sailnovo 15 cu ft bag. It measures 54 by 42 by 17 inches, providing a substantial increase in storage volume. The black and gray color scheme differs from the original black design. It maintains the soft-shell construction and universal mounting capabilities for bare roofs. The weight is 8.5 pounds, slightly heavier than the original. You gain more space for luggage while retaining the flexibility of a soft carrier. This option is best for drivers who need higher capacity but cannot install permanent roof racks. It sacrifices some aerodynamic sleekness for the added utility.
MCBD 40 cu ft Soft-Shell Roof Bag
The MCBD 40 cu ft Soft-Shell Roof Bag provides nearly three times the capacity of the original Sailnovo model. It is designed for large families or those moving significant amounts of gear. The soft-shell design allows it to conform to various roof shapes, though the folded dimensions are not specified in the data. It mounts directly to the roof, suitable for vehicles with or without racks. The weight is 16.3 pounds, which may impact fuel efficiency more than the lighter 15 cu ft bag. You get massive storage space at the cost of increased wind resistance. This bag is ideal if you prioritize volume over aerodynamic performance and need to haul large loads.
Mockins 40 CuFt XXL Roof Bag
The Mockins 40 CuFt XXL Roof Bag offers the same 40 cubic feet as the MCBD option but with different dimensions. It measures 72 by 48 by 20 inches when deployed, making it one of the largest soft-shell bags available. The black vinyl construction provides robust weather protection. It is designed for vehicles without roof racks, similar to the original Sailnovo model. The large footprint requires a wide vehicle roof for safe mounting. You gain enormous storage capacity, suitable for hauling bulky items. The weight is 15.8 pounds. This bag is best for buyers who need maximum capacity and have a wide vehicle. It sacrifices aerodynamic efficiency for the ability to carry more gear.
Mockins 35 cu ft Black Roof Bag
The Mockins 35 cu ft Black Roof Bag provides more than double the capacity of the original Sailnovo 15 cu ft bag. It measures 60 by 42 by 24 inches, offering ample space for road trips. The black soft-shell design matches the original color but offers significantly more volume. It includes a complete mounting kit for vehicles without roof racks. The weight is 13 pounds, which is heavier than the original. You get strong weather protection and substantial storage space. This option is ideal if you need more room than the 15 cu ft model provides. It suits buyers who prioritize capacity and weather resistance over aerodynamic efficiency. The larger size demands a wider vehicle roof for safe installation.
Quick picks
Our 7 picks
Sailnovo 15 cu ft Waterproof Roof Bag
Best for: smaller vehicles and bare roof mounting
- Capacity
- 15 cubic feet/430 L
- Shell Type
- Soft Shell
- Water Resistance
- Waterproof
- Dimensions
- 14.2 x 9.45 x 7.48 in
- Vehicle Type
- Car
- Mount Type
- Roof Mount
View on Amazon: Sailnovo 15 cu ft Waterproof Roof Bag Affiliate link
This soft-shell roof bag offers 15 cubic feet of storage, fitting 3 to 5 medium suitcases. It measures 41 by 35 by 17 inches when packed. The 1000D material provides waterproof protection with double-seam technology. You can mount it on bare roofs or crossbars. The design includes velcro restraints to reduce noise and six tie-down straps for security. It is a compact option for smaller vehicles.
Pros
- 15 cubic feet capacity holds 3-5 medium suitcases
- 1000D waterproof material with double-seam construction
- Mounts to bare roofs, crossbars, or side rails
- Includes 4 door hook straps and 6 tie-down straps
- Velcro restraints reduce strap flapping noise
Cons
- 15 cubic feet capacity is smaller than most alternatives on this list
- Soft-shell design offers less rigidity than hard cases
- No mention of integrated locking mechanisms for theft prevention
Good fit if
- You need a compact bag for smaller vehicles
- You want a waterproof option for bare roofs
- You prefer a soft-shell design for easy storage
Skip if
- You require more than 15 cubic feet of space
- You prefer a rigid hard-shell cargo carrier
- You need integrated locking systems for security
Verdict: Sailnovo 15 Cu Ft Waterproof Roof Bag fits drivers who need modest, waterproof storage for smaller cars or bare roofs. It is not suitable for those requiring high capacity or rigid protection.
Sailnovo 21 cu ft Soft Roof Bag
Best for: cars without roof rails
- 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 soft-shell storage. It weighs 8.16 pounds and measures 9.84 by 7.09 by 13.8 inches. The bag uses tie-down straps for installation on cars without roof rails. It is fully waterproof. You get two height options. This carrier fits vehicles with limited roof space.
Pros
- 21 cubic feet capacity
- Waterproof soft shell
- Lightweight at 8.16 pounds
- Fits cars without roof rails
Cons
- Smaller capacity than 30 to 40 cu ft competitors
- Soft shell offers less protection than hard cases
- Requires manual tie-down strap installation
Good fit if
- You need extra space for weekend gear
- Your car lacks roof rails or crossbars
- You want a lightweight, packable carrier
Skip if
- You need maximum security for valuables
- You require a hard-shell design
- You need more than 21 cubic feet
Verdict: Sailnovo 21 cu ft Waterproof Roof Bag is a practical soft-shell option for cars without rails. It suits buyers who need moderate storage without installing permanent roof racks.
Mockins 30 cu ft Soft-Shell Vinyl Roof Bag
Best for: carrying large loads without roof racks
- Capacity
- 30 cu ft
- Shell Type
- soft-shell vinyl
- Water Resistance
- waterproof
- Security
- combination lock
- Vehicle Compatibility
- vehicles with or without roof rack
- Dimensions
- 60 x 43 x 20 in
View on Amazon: Mockins 30 cu ft Soft-Shell Vinyl Roof Bag Affiliate link
This Mockins soft-shell vinyl bag offers 30 cubic feet of storage. It measures 60 x 43 x 20 inches and weighs 15.5 pounds. The waterproof design includes a zipper flap and welded seams. You get ratchet straps, door hooks, and a roof mat. It fits vehicles with or without roof racks. This carrier is ideal for those needing substantial overhead space without a permanent rack system.
Pros
- 30 cubic feet capacity
- Fits vehicles without roof racks
- Includes combination lock
- Waterproof vinyl with welded seams
Cons
- 15.5 pounds is heavier than smaller bags
- 20 inches height may affect clearance
- Soft shell offers less rigidity than hard cases
Good fit if
- You need to carry bulky items like luggage
- Your vehicle lacks a roof rack system
- You want a waterproof bag with a lock
Skip if
- You require a hard-shell carrier for security
- Your vehicle has low clearance under 5 feet
- You prefer a lighter bag under 10 pounds
Verdict: Mockins 30 CuFt Soft-Shell Roof Bag provides ample space for families or travelers needing to move large gear without a roof rack. It suits those prioritizing capacity and weather protection over aerodynamic efficiency.
Rooftop Ranger 21 cu ft Soft Shell Cargo Carrier
Best for: drivers without roof racks needing high capacity
- Capacity
- 21 cu ft
- Shell Type
- Soft shell
- Water Resistance
- 100% waterproof
- Security
- Security lock
- Installation
- Door hooks and straps
- Vehicle Compatibility
- With or without roof racks
View on Amazon: Rooftop Ranger 21 cu ft Soft Shell Cargo Carrier Affiliate link
The Rooftop Ranger 21 cu ft carrier offers 100% waterproof protection for your gear. It measures 54 x 42 x 17 inches and weighs 8.5 pounds. The soft shell design fits vehicles with or without roof racks using door hooks and straps. It includes a security lock and non-slip mat. This bag suits drivers needing extra space without permanent rack installation.
Pros
- 21 cubic feet of storage capacity
- 100% waterproof soft shell construction
- Works with or without roof racks
- Includes security lock and non-slip mat
Cons
- Heavier at 8.5 pounds than standard roof bags
- Larger footprint may not fit small vehicles
- Soft shell offers less aerodynamic efficiency than hard cases
Good fit if
- You need more than 15 cu ft of space
- Your vehicle lacks roof racks
- You want waterproof protection for all-weather travel
Skip if
- You require a rigid hard-shell carrier
- Your vehicle roof cannot support 8.5 pounds
- You need aerodynamic performance for highway speeds
Verdict: Rooftop Ranger 21 cu ft Soft Shell provides ample waterproof storage for drivers without racks. It fits those prioritizing capacity and universal mounting over aerodynamic design.
MCBD 40 cu ft Soft-Shell Roof Bag
Best for: Large families with roof racks
- Capacity
- 40 cu ft
- Shell Type
- soft-shell, 900D PVC tarpaulin
- Water Resistance
- 100% waterproof
- Security
- combination lock
- Dimensions
- 72 x 48 x 20 in
- Vehicle Type
- Car, SUV
View on Amazon: MCBD 40 cu ft Soft-Shell Roof Bag Affiliate link
This MCBD roof bag offers 40 cubic feet of storage in a soft-shell design. It measures 72 by 48 by 20 inches and weighs 16.3 pounds. The 900D PVC tarpaulin material is 100% waterproof. It includes a combination lock and anti-slip mat. You should use this carrier for large SUVs or trucks with roof racks. It fits roofs between 68 and 80 inches long.
Pros
- 40 cubic feet capacity for large loads
- 100% waterproof 900D PVC tarpaulin shell
- Includes combination lock for security
- Anti-slip mat protects vehicle roof
Cons
- Soft-shell design offers less aerodynamic efficiency
- Requires roof rails or crossbars for mounting
- Heavy at 16.3 pounds when packed
Good fit if
- You need extra space for camping gear
- You drive a large SUV or truck
- You want a waterproof soft-shell option
Skip if
- You have a roofless vehicle without racks
- You prefer hard-shell aerodynamic designs
- Your roof length exceeds 80 inches
Verdict: MCBD 40 cu ft Waterproof Soft-Shell Roof Bag provides ample storage for families moving or camping. It suits drivers with wide roofs who prioritize capacity over speed.
Mockins 40 CuFt XXL Roof Bag
Best for: max capacity hauling on vehicles without racks
- Capacity
- 40 Cubic Feet
- Shell Type
- Vinyl
- Water Resistance
- Waterproof
- Security
- Combo lock
- Vehicle Compatibility
- Most vehicles, with or without roof rack
- Dimensions
- 72 x 48 x 20 in
View on Amazon: Mockins 40 CuFt XXL Roof Bag Affiliate link
This is a 40 cubic foot soft shell cargo carrier designed for vehicles with or without roof racks. It measures 72 by 48 by 20 inches and weighs 15.8 pounds. The vinyl shell features waterproof zippers and reinforced seams. You get six door hooks and two trunk hooks for mounting. It includes a combo lock for security and a protective roof mat. This large bag suits extended road trips or moving needs.
Pros
- 40 cubic feet of storage capacity
- Works on vehicles without roof racks
- Includes 6 door hooks and 2 trunk hooks
- Waterproof vinyl shell with reinforced seams
Cons
- Heavier at 15.8 pounds than smaller bags
- Larger footprint may not fit compact cars
- No mention of aerodynamic design features
Good fit if
- You need maximum storage space for moving
- Your vehicle lacks a roof rack system
- You require secure mounting with multiple hooks
Skip if
- You drive a small sedan with limited roof width
- You prefer a lighter carrier under 10 pounds
- You need a rigid hard shell for security
Verdict: Mockins 40 CuFt Vinyl Roof Bag offers massive capacity for bulky loads. It fits buyers who need to haul gear without a rack. The large size demands a wide vehicle roof.
Mockins 35 cu ft Black Roof Bag
Best for: vehicles without roof racks
- Capacity
- 35 cu ft
- Shell Type
- Vinyl
- Water Resistance
- Waterproof
- Dimensions
- 60 x 42 x 24 in
- Vehicle Type
- Car
- Mount Type
- Roof Mount
View on Amazon: Mockins 35 cu ft Black Roof Bag Affiliate link
This Mockins roof bag offers 35 cubic feet of storage in a 60 x 42 x 24 inch vinyl shell. It provides waterproof protection with welded seams and a protected zipper. The set includes straps, hooks, and a roof mat for secure mounting on vehicles with or without racks. It weighs 13 pounds and fits SUVs, trucks, and vans.
Pros
- 35 cubic feet capacity for large loads
- Waterproof vinyl shell with welded seams
- Includes roof mat and multiple strap types
- Mounts securely on vehicles without crossbars
Cons
- Heavier at 13 pounds than soft bags
- Shorter length than 40 cubic feet models
- No integrated locking mechanism mentioned
Good fit if
- You need to carry oversized gear like tents
- Your vehicle lacks roof rack crossbars
- You want a complete mounting accessory set
Skip if
- You require more than 35 cubic feet
- You prefer a lightweight fabric shell
- You need a built-in key lock system
Verdict: Mockins 35 Cu Ft Black Roof Bag fits buyers needing substantial storage on vehicles without racks. It offers a complete mounting kit and strong weather protection for road trips.
Specifications side by side
| Spec | Sailnovo 15 cu ft Waterproof Roof Bag | Sailnovo 21 cu ft Soft Roof Bag | Mockins 30 cu ft Soft-Shell Vinyl Roof Bag | Rooftop Ranger 21 cu ft Soft Shell Cargo Carrier | MCBD 40 cu ft Soft-Shell Roof Bag | Mockins 40 CuFt XXL Roof Bag | Mockins 35 cu ft Black Roof Bag |
|---|---|---|---|---|---|---|---|
| Capacity | 15 cubic feet/430 L | 21 cubic feet | 30 cu ft | 21 cu ft | 40 cu ft | 40 Cubic Feet | 35 cu ft |
| Shell Type | Soft Shell | Soft Shell | soft-shell vinyl | Soft shell | soft-shell, 900D PVC tarpaulin | Vinyl | Vinyl |
| Water Resistance | Waterproof | Waterproof | waterproof | 100% waterproof | 100% waterproof | Waterproof | Waterproof |
| Security | not stated | not stated | combination lock | Security lock | combination lock | Combo lock | not stated |
| Installation | not stated | Tie-Down Strap | not stated | Door hooks and straps | not stated | not stated | not stated |
| Vehicle Compatibility | not stated | not stated | vehicles with or without roof rack | With or without roof racks | not stated | Most vehicles, with or without roof rack | not stated |
| Dimensions | 14.2 x 9.45 x 7.48 in | 9.84 x 7.09 x 13.8 in | 60 x 43 x 20 in | 54 x 42 x 17 in | 72 x 48 x 20 in | 72 x 48 x 20 in | 60 x 42 x 24 in |
| Recommended Use | not stated | not stated | not stated | not stated | not stated | Road trips, camping, moving | not stated |
| Vehicle Type | Car | Car | Car, SUV, Truck | Car | Car, SUV | Car, SUV, Truck, Van | Car |
| Size | 15 cubic feet/430 L | 21 Cubic Feet | 30 Cubic Feet | 21 Cubic Feet | 40 Cubic Feet | 40 Cubic Feet | 35 Cubic Ft |
| Mount Type | Roof Mount | Roof Mount | Roof Mount | Roof Mount | Roof Mount | Roof Mount | Roof Mount |
| Includes Bag | not stated | not stated | With Bag | not stated | With Bag | not stated | not stated |
| Weight | not stated | 8.16 pounds | 15.5 pounds | 8.5 pounds | 16.3 pounds | 15.8 pounds | 13 pounds |
| Color | black | Black | Black/Orange | Black And Gray | Blue | Black | Black |
| Model | AMD005033 | Sailnovo5033-FR | MA-RB-30OR-88-V1 | LTCRB-002 | 40cf | MA-RB-40BLK-89-V1 | MA-RB-35BLK-60X42-17 |
If you compare smaller storage volumes, examine kenmore 4 4 cu ft top alternatives for exact dimension differences.
Frequently asked questions
What is the largest capacity roof bag available in this list?
The largest option is the Mockins 40 CuFt XXL Roof Bag. It offers 40 cubic feet of storage space, which is the highest capacity listed. This model measures 72 inches in length and 48 inches in width. It is designed for vehicles like vans and trucks that have wide roofs. The soft-shell vinyl construction allows it to hold bulky gear without requiring permanent roof racks.
Which roof bag is best for cars without roof rails?
The Sailnovo 21 cu ft Soft Roof Bag is a strong choice for cars without rails. It mounts directly to the roof using a universal system. This soft-shell bag provides 21 cubic feet of storage, which is larger than the 15 cu ft Sailnovo model. It weighs 8.16 pounds and fits well on sedans or smaller SUVs that lack permanent rack systems.
Are there any hard-shell alternatives to the Sailnovo soft bags?
No hard-shell alternatives are listed in this comparison. All seven products featured here are soft-shell roof bags. They use flexible materials like vinyl or fabric to provide waterproof storage. This design allows them to conform to various roof shapes and mount easily without the need for permanent crossbars or racks. If you need rigid protection, you would need to look at different product categories.
Which model is best for carrying large loads on a truck?
The Mockins 40 CuFt XXL Roof Bag is ideal for trucks with wide beds or roofs. It measures 72 inches long and 48 inches wide, providing ample space for large items. This bag supports up to 40 cubic feet of volume. It is suitable for trucks, vans, and SUVs. The soft-shell design ensures it fits securely on broad surfaces while protecting cargo from the elements.
How does the MCBD 40 cu ft bag compare to the Mockins 40 cu ft?
Both bags offer 40 cubic feet of capacity, but they differ in dimensions and weight. The MCBD bag weighs 16.3 pounds, while the Mockins 40 CuFt XXL weighs 15.8 pounds. The Mockins model is significantly wider at 48 inches compared to the MCBD listed width of 1 inch, which likely indicates a folded state. The Mockins bag is better for wide vehicles like vans, whereas the MCBD suits families with roof racks.
Is the Rooftop Ranger 21 cu ft bag heavier than the Sailnovo 21 cu ft?
Yes, the Rooftop Ranger 21 cu ft Soft Shell Cargo Carrier is slightly heavier. It weighs 8.5 pounds, whereas the Sailnovo 21 cu ft Soft Roof Bag weighs 8.16 pounds. Both offer the same 21 cubic feet of storage. The Rooftop Ranger measures 54 inches long and 42 inches wide, providing a different footprint than the Sailnovo model. Both are soft-shell options for vehicles without permanent racks.
What is the best option for a small car with a bare roof?
The Sailnovo 15 cu ft Waterproof Roof Bag is best for smaller vehicles. It offers 15 cubic feet of storage, which is modest but sufficient for small cars. The folded dimensions are 14.2 inches long, 9.45 inches wide, and 7.48 inches high, making it easy to store when not in use. It mounts directly to bare roofs without requiring any rack installation.
Which roof bag includes a mounting kit for vehicles without racks?
The Mockins 35 cu ft Black Roof Bag includes a complete mounting kit. It is designed for vehicles without roof racks, such as sedans or small SUVs. This bag provides 35 cubic feet of storage and measures 60 inches in length. The included kit ensures secure attachment to the roof. It offers strong weather protection, making it suitable for road trips and carrying substantial gear.