This waterproof dry bag is made from 500D PVC Tarpaulin, which makes it waterproof, dust-proof and scratch-resistant. Solid roll-top closure system provides secure watertight seal, just put your gear in bag, grab top woven tape and roll down tightly 3 to 5 times and then plug buckle to complete seal, whole process is very quick. It has 5 Liter storage capacity, light and portable, the dry bag can float on water after rolled, perfect for boating, kayaking, paddling, sailing, canoeing, surfing or having fun on the beach. 7 1/2''L x 15 7/10''W