? LARGE COMPACITY - The car roof bag overall size is 63''x43.3''x19.7''. Expand the carrying ability of your car for more 30 cubic feet. Provides extra space for storage on the way. ? WATERPROOF & DUSTPROOF - Made of 500D PVC to make it real waterproof. Double flap with velcro for double waterproof protection. Extra long flap helps protect zipper and resist water and dust. ? USER-FRIENDLY DESIGN - Non-slip grip mat enhances your travel by making sure that the bag does not move on your roof and adds padding so it WON'T scratch and ruin car paint; Thick, wide, triple sewn straps and clasps will hold your valuables steady as a rock and gripped in place throughout your road trip. ? EASY INSTALLATION & STORAGE - Straps attach to side rails or cross bars or basket. Just a matter of minutes. Soft and foldable. The rooftop cargo carrier also comes with the storage bag for easy storage. ? UNIVERSAL FIT - This cargo bag fits all kinds of cars with racks. Take the cargo bag to the park, the beach, the sports field, or any place you need to be storaged. Works on ALL vehicles with rack. Suitable for cars, vans, SUVs,etc.