LARGE CAPACITY: dimension: 44 x 34 x 17"; 15 cubic feet; it holds a lot which can maximize your vehicle's cargo space and protect your belongings from exposure DURABLE MATERIAL: made from 1000D high density fabric with mesh netting inside and waterproof PVC coated on both sides, this roof cargo bag is waterproof and anti-friction, which keeps your gear in place and away from rain, grit, snow, wind and sun EXTRA WATERPROOF COATING: a 600D nylon seamless camouflage case can cover the whole cargo bag in case water get through from zipper; ideal for family road trips, adventures like off-roading EASY TO USE: 4 built-in tie straps, 4 short tied rope (30 in / 74 cm) can fix on roof rack of the car; we also provide 2 long ropes (138 in / 3.5 m) which can directly tie the bag on the roof of your car without roof rack COMPACT TO STORE: The set comes with a portable bag, you can fold this big cargo bag in the smaller one to store anywhere conveniently when not in use