XPAC is a multilayered textile, fabricated in Putnam Connecticut, USA. The manufacturer specializes in racing sails for boats, but also makes great fabrics for bags. XPAC is an innovative material; a smooth feel but with a rigid structure-- stands up on its own, but also light weight. The fabric has a waterproof laminate, and paired with our RF Welded liner, the roll-top system will keep your gear dry.