Store your sleeping bag, clothing, and any other items you want to keep dry in a Dri Sak. No matter what size you choose or need Snugpak has a size that is sure to be right for your situation. These Dri Saks are seam taped nylon with a TPU film lamination to ensure protection if your gear takes an unexpected dive into the water. They are a great addition that can be used in conjunction with any of the Snugpak backpacks or any other backpacks. Snugpak Dri Sak bags are not intended to be submerged for extended periods of time. Roll top closure must be closed correctly. It is recommended rolling 3 times and buckle to keep contents dry. Contact with abrasive or sharp objects can damage and/or compromise the integrity and waterproofness.