Lone Peak's Deluxe Wedge Expandable Seat pack features a large main compartment that is expandable when the lower zipper is open. 1000 Denier Cordura expansion gusset allows for larger load carrying capability. Hook and loop seat post connections and EZ off 2 buckle quick-release suspension system easily attaches to seat rails. A molded polyethylene stiffener is placed internally within a sleeve on the top and the bottom for added ruggedness and pack integrity. 3M Scotchlite reflective material and Lone Peak light hangar also gives you added visibility options at night. Coverlight truck tarp is used on the top and bottom of pack for the ultimate in abrasion resistance and water resistance. Perfect for wallets, keys, tools, tire levers, patch kits and other sizable items. Lone Peak has been producing technical cycling gear in the USA since 1979 and our products are built to last a lifetime. All Lone Peak products carry a lifetime guarantee against manufacturing defects for the original owner.