The DrySpec D28 Dual-End dry bag is constructed of RF welded 18 oz. vinyl that guarantees 100% waterproof performance even when submersed. Unlike other dry bags, the D28 features a Dual-End roll end design that allows access to contents from either end of the bag, making it easy to get to your contents no matter where it's located within the bag. Select which end you want to open and then simply release the two securing clips. Unroll the bag and reach in to get what you need. No need to disconnect the mounting straps. Simply select the end you want to access, unclip, unroll, grab, re-roll, secure the clips, and go.