Pack it in and pack it out with the PackOut Compression Stuff Sack. This storage solution is the simplest way to get big bulky items to pack down small utilizing a 2-strap roll top closure. Just as lightweight durable and weather protective as our other PackOut Stuff Sacks this compression bag also has a reinforced bottom.. . 100% nylon 40D siliconized diamond ripstop with PU coating & 100% Nylon taffeta. . Water Resistant. Ultralight. Durable. Semi-Translucent. . Simple 2 Strap Compression Design. Roll-Top Closure. Reinforced Bottom. Designed for Ease of Packing