Made from a high-tenacity Cordura ripstop nylon fabric, this 10L compression sack is strong and durable. The siliconized coating on the outside of the fabric and PU coating on the inside provide protection from the elements (seams are not taped so not fully waterproof). Compressions sacks provide space-saving solutions by packing and compressing contents to half their size, are handy for bulky sleeping bags or clothing, and are ideal to help you separate and identify your gear with ease.