GEARLASSO Car Roof Bag 21 Cubic Feet – waterproof rooftop cargo bag for cars, SUVs & vans

Overview

A roof bag is the quick-and-cheerful way to add storage for a trip without swapping to a bigger boot capacity or buying a full roof rack system. The GEARLASSO Car Roof Bag 21 Cubic Feet is built for exactly that kind of “we need a bit more space” moment, with a waterproof outer and a universal approach so it can be used with or without a roof rack.

In day-to-day terms, this is the sort of rooftop cargo bag you’d reach for when you’re loading up for a holiday, a weekend break, or moving bulky but light items—think soft luggage, camping extras, or gear that doesn’t mind being stowed above the car. It’s not trying to be a hard-shell replacement, and you shouldn’t expect it to behave like a purpose-built rack platform. On paper, it’s more about practical capacity and weather protection.

Worth noting: the listing mentions a universal fit, but every vehicle shape (and whether you have a roof rack) is a bit different. Setup quality will depend on how comfortably the straps and hooks can sit where your roof rack—or attachment points—allow.

What you’ll notice day to day

This bag is designed around the basics that matter once you’re on the road: keeping contents dry, holding them securely, and staying stable in normal driving conditions.

The waterproof 840D heavy-duty PVC outer is the headline feature if you regularly deal with British drizzle, coastal weather, or the kind of showers that show up mid-journey. It should also be a better match for frequent use than thin, lightweight covers that feel a bit too fragile for repeated packing.

You also get an anti-slip mat, which helps with grip between the bag and the roof rack/roof surface (where applicable). For a rooftop bag, that small detail can make a bigger difference to how confidently you pack and drive.

Key points

If you want extra luggage space for cars, SUVs and vans, this 21 Cubic Feet car roof bag focuses on three things: waterproofing, a universal fit strategy, and a fastening setup that doesn’t rely on guesswork.

It’s delivered with a combination lock for added peace of mind, six door hooks for securing the bag through the car/roof area as described in the product details, and four extra straps for securing and fine-tuning the load. That combination suggests the brand expects real-world use where you might need a bit more control over how everything sits.

The universal fit is the main “decision driver” for many buyers. If you don’t want to be limited by a very specific rack layout, this kind of roof cargo bag can feel more flexible—especially compared with options that are clearly designed only for one roof rack style.

Tech specs

• Type: Car roof bag / rooftop cargo bag
• Capacity: 21 Cubic Feet
• Material: 840D heavy-duty PVC
• Waterproof: Yes
• Fit: Universal fit with or without roof rack
• Lock: Combination lock
• Included securing parts: anti-slip mat, 6 door hooks, 4 extra straps

Usage tips

Getting the best result with any roof bag comes down to setup and packing. Even with a waterproof cover and heavy-duty material, a bad strap layout can lead to movement—so take the time to get the bag lying flat and centred.

A practical way to load it: start with heavier, flatter items at the base (within the bag), then place softer items on top. Avoid overstuffing, the goal is a firm but not strained shape. Once packed, use the anti-slip mat where it fits the roof/rack contact area, then adjust the straps so the tension is even rather than pulling in one direction.

If you’re using it with a roof rack, double-check that the hooks and straps land where they hold securely. If you’re using it without a roof rack, you’ll want to be extra careful with how it’s anchored, because the stability will depend more on your vehicle’s roof and the attachment points available.

Where it shines (and where it may not)

This is a sensible pick if you want extra rooftop storage with waterproof protection, and you like the idea of a universal roof bag that can work with or without a roof rack. It also suits buyers who prefer having a combination lock included rather than needing a separate lock purchase.

However, it may not be the best match if you need rigid, box-like protection. Roof bags are soft by nature, so if your priority is impact resistance (for example, carrying very fragile items), a different storage approach might make more sense. Also, if you’re expecting a perfectly tailored fit for one specific vehicle model, a universal system may feel slightly less “plug-and-play” during installation.

Keep an eye on the fastening: the bag includes multiple securing components (door hooks, extra straps), which implies setup matters. If you don’t want to spend a few minutes fine-tuning straps before driving, you might find another simpler storage option more convenient.

Is it worth it?

Buy the GEARLASSO 21 Cubic Feet car roof bag if you’re after waterproof rooftop storage for cars, SUVs or vans, and you want a universal fit that can be used with or without a roof rack. It’s especially worth considering if you regularly travel in changeable weather and want the inclusion of an anti-slip mat plus a combination lock.

Skip it if you need hard-shell security for fragile items, or if you want a setup that requires minimal adjustment. It’s also not ideal if you’re not comfortable using straps and hooks properly before setting off—because with roof bags, the quality of the install is part of the experience.

Ultimately, it sits firmly in the “practical family travel” category: more about space and weather protection than premium, rigid storage. If that’s what you’re trying to solve, it’s a strong candidate.

Mini FAQ

Will it work with my roof rack?

The product is described as a universal fit with or without a roof rack, so it’s designed to adapt to both scenarios. Exact compatibility will still depend on how your roof rack bars and hook points line up.

Is it actually waterproof?

The bag is listed as waterproof and made from 840D heavy-duty PVC. That’s the right combination for wet weather storage, but you’ll still want to make sure it’s sealed and strapped down correctly.

What’s included to secure it?

You get an anti-slip mat, a combination lock, 6 door hooks, and 4 extra straps, alongside the bag itself.

How much can I fit?

The stated capacity is 21 Cubic Feet. As with any soft rooftop storage, the way you pack (and whether you overfill) can change how usable that space feels.