These ultralight pockets with foam backing attach to a pack's side, front or lid compression strap, offering you extra room, protection & convenience. They feature a water-resistant YKK zipper with the protection of a "garage" that the slider parks in. Constructed of ultralight 70 Denier Ripstop Hybrid Sil-Nylon Cordura and 210 Denier Nylon Cordura. The Armored Pockets can also function as a stand-alone packing system.