American Kargo 3517-0331 Hi-Viz Trooper Backpack Four-way adjustable butterfly harness ensures security and a proper fit Designed to be used in conjunction with American Kargo hydration systems Retroflect material provides additional visibility in less than optimal riding conditions Includes optics pocket, storage pocket, internal mesh pockets, TSA lock-compatible side compartment and 15" padded laptop storage Easy overhead removal when releasing lower buckles