For UK motorists seeking extra storage space for their adventures, the SMONTER 520L Waterproof Rooftop Cargo Bag offers an intriguing solution. This rooftop carrier promises to expand your vehicle’s cargo capacity significantly, but like any product, it comes with both advantages and potential drawbacks.

- 100% waterproof design made of durable 500 D polyester and mesh material with dual seam technology
- Extra large capacity of 18.5 cubic feet (116cm x 90cm x 50cm) to maximize cargo space
- High strength nylon straps for flexible length adjustment and enhanced stability on the road
- Compatible with all vehicle types (SUVs, Vans, Sedans) with or without racks; easy installation without tools
- Safety reflective strips for high visibility in dim conditions
- Comes with accessories: carrier bag, storage bag, anti-slip mat, and multiple straps
- Two-year warranty against defects in material and workmanship, with a three-year warranty on the model
- Color option available in bright orange for increased visibility

- 100% waterproof design with 500D polyester and dual seam technology, ensuring protection against weather elements
- Large capacity of 18.5 cubic feet (116X90X50cm) for maximizing cargo space during trips
- Safety features include high-quality 3.8cm wide nylon straps for stability on bumpy roads
- Compatible with all vehicles (SUV, Van, Sedan, Jeep) with or without roof racks, easy to install without tools
- Includes accessories: 1 carrier bag, 4 attachment straps, and 1 anti-slip mat
- Two-year warranty covering defects in material and workmanship
- Model available in black, with part number CDB-002

Pros
Generous Capacity
The SMONTER 520L boasts an impressive 18.5 cubic feet of storage space, measuring 116x90x50cm. This expansive capacity allows travellers to pack all their essentials for long trips or outdoor excursions.
Versatile Compatibility
One of the standout features is its ability to fit various vehicles, whether they have a roof rack or not. This versatility makes it an attractive option for a wide range of UK drivers.
Durable Construction
Crafted from 500D polyester with mesh material, the bag is designed to withstand various weather conditions. The dual seam technology and waterproof design aim to keep your belongings dry during typical British weather.
Easy Installation
The bag comes with heavy-duty straps and buckles, designed for straightforward installation and secure attachment to your vehicle’s roof.
Cons
Waterproofing Concerns
While the manufacturer claims 100% waterproofing, some customers have reported minor issues with water seepage during heavy rain. This could be a significant drawback for UK users, given our often unpredictable weather.
Wind Noise and Fuel Efficiency
As with many rooftop carriers, users may experience increased wind noise and reduced fuel efficiency, especially at higher speeds. This is an important consideration for those planning long journeys.
Storing The SMONTER 520L Waterproof Rooftop Cargo Bag When Not in Use
Although the bag is collapsible, storing a 520L carrier when not in use may be challenging for those with limited storage space at home.
Final Thoughts
The SMONTER 520L Waterproof Rooftop Cargo Bag offers a flexible solution for UK drivers needing extra storage space. Its generous capacity and versatile fit make it suitable for various vehicles and travel needs. However, potential buyers should weigh these benefits against the reported waterproofing issues and the impact on vehicle performance.For those embarking on family holidays, camping trips, or simply needing extra space for bulky items, this rooftop cargo bag could be a valuable addition to your travel gear.