Designed to keep valuables safe and dry in equipment bags, or to keep wet objects away from dry personal belongings. Made from high performance, waterproof fabric with sewn and bonded seams. How to Use: Roll down the top strip at least three times over before closing the buckles. Avoid contact with sharp objects. Not intended for situations where the wet/dry bag will be submerged under water. It is recommended that all electronic devices be "double bagged" inside a second wet-dry bag. Large bag has a capacity of 4 liters.