The Roll-Top Dry Stuff Sack is a lightweight waterproof bag made for keeping camping and backpacking gear dry. It is made from 20D Silnylon with fully taped seams for added water protection. Available in 5L, 10L, 20L, 25L, and 35L sizes, it can be used to organize clothing, sleeping gear, and other essentials. The 35L size can also work as a pack liner. The sack weighs about 1.1 oz (31.19 g) and is designed for lightweight outdoor trips.