TIROL Waterproof Roof Top Carrier Cargo Luggage Travel Bag (15 Cubic Feet) For Vehicles With Roof Rails Waterproof rooftop cargo bag with 15 cubic feet of space. When not in use, folds for easy and compact storage. Safely pack light-duty cargo and soft goods. Weatherproof double-wall vinyl construction, welded seams to seal water out. Mounts directly to roof rack systems using 8 built-in tie straps.