The Granite Gear Amored Pocket serves its purpose well. It works by attaching to the compression straps on backpacks, so you are able to carry even more of your supplies with you. You can also choose not to attach them onto your backpack and have them act as a stand-alone packing system. Granite Gear also incorporated a YKK water-resistant zipper in the design of the Armored Pockets. The Armored Pockets are completely constructed out of 70-denier ripstop Hybrid sil-nylon and 210-denier nylon cordura. The Granite Gear Armored Pocket will become an exstension of your pack whenever you need to carry those extra little somethings.