28 cubic feet of waterproof roof storage for cars with no roof rack
Is this the right fit?
- Best for
- family road trips, moves, and camping runs where the trunk fills before the passengers do
- Skip if
- Any roof bag costs you fuel economy and adds wind noise at highway speed, and this one is large enough that you will notice both
- Check before ordering
- Confirm the dimensions, exact model, included parts and return terms on the Amazon listing before ordering.
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The RoofPax XXL is a 28 cubic foot soft rooftop cargo bag with a waterproof shell, ten heavy-duty tie-down straps, and four door hooks so it can mount on vehicles with no roof rack or side rails. Twenty-eight cubic feet is genuinely large, roughly the difference between a packed sedan and a packed sedan plus a small closet, which is what makes road trips with a full car workable. The door hooks are the meaningful detail: they let the straps anchor through the door frames rather than requiring rails you may not have. Best fit: family road trips, moves, and camping runs where the trunk fills before the passengers do. A roof bag does cost you fuel economy and some wind noise at highway speed, which is the standing tradeoff for all of them.
Pros
- Mounts on cars with no roof rack at all, using the four included door hooks
- 28 cubic feet is enough to move the bulky soft luggage out of the cabin
- Waterproof shell rather than a water-resistant one, which matters on a long wet drive
- 10 tie-down straps included, so you are not sourcing hardware separately
Cons
- Any roof bag costs you fuel economy and adds wind noise at highway speed, and this one is large enough that you will notice both
Frequently asked questions
Does it work if my car has no roof rails?
Yes, that is what the four door hooks are for. The straps route through the door frames and anchor inside, so bare-roof vehicles are covered. You do open the doors to install it.
Is it actually waterproof in heavy rain?
The shell and seams are built to keep water out, and most users report dry contents through rain. Packing softer items in trash bags is still cheap insurance on a multi-day trip.
How much does it hurt gas mileage?
Expect a noticeable drop at highway speed, since you are adding a large object to the roofline. The size that makes it useful is the same size that creates drag.
Can I leave it on the car when it is empty?
Better not to. An empty soft bag flaps at speed, which wears the fabric and gets loud. It folds down small enough to stash in the trunk between legs of a trip.
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