The Unigear Floating Waterproof Dry Bag 5L/10L/20L/30L/40L, Rolltop Sack keeps gear dry when camping, hiking, swimming, kayaking, rafting, and fishing. Its impermeable material and roll-top closure protect water splashes or brief immersion. PVC material with a high density and thickness for puncture and aging resistance. Designed to withstand long-term use, the metal lock and Duraflex buckle are durable, and reinforced joints are incredibly durable.