15 cubic feet roof bag:
The TIROL T24528 luggage bag is a roof bag with a volume of 15CUB FEET.H3: How to Install a Roof Bag.
Dimensions is 43"x 34"x17". Fits all roof racks.
The rooftop cargo bag, 15 cubic feet capacity, is suitable for most cars, small vans with roof rails for use with passenger cars, vans, and SUVs with roof rack systems.