Sharkskin's dry duffle bag come in two sizes,40L and 70L, both with dry zip outer convenience pockets and corrosion resistant materials throughout. The bags are designed to meet the technical needs of the active watersports enthusiast. Just as Sharkskin protects you from the elements, your Sharkskin performance bag will protect your equipment by keeping the elements at bay. HD Welded PVC Construction, Roll Top Sealing System. It's perfect for keeping your gear dry while you play!