1.Our dry bags are meant to float and stay a top of water so you’ll never lose sight of your gear during kayak flips, etc. When you roll the top of your dry bag down, there should be a little bit of air in it giving it a "inflated" type of feel so it will always float to the surface if lost. 2.However, because our dry bags are meant to float, they are not fully submersible and should never be submerged underwater for longer than 5-10 seconds. 3.Protect your bear: Constructed from commercial-grade 500D PVC for high performance, durability, and protection. All seams are thermowelded shut to provide the ultimate waterproof protection for your gear!