Hydrapak Morro 100 Oz Gray/Red 100oz (3L) Shape-Shift Reservoir with Plug-N-Play and Quantum Clip 800 cubic inches (13.1L) gear storage 1.13lbs weight (empty) 210D Baby Rip nylon and 100D Trilobal nylon construction Quad compression strap down system High ventilation shoulder straps with custom perforated eva foam Large main pocket with two zippered organizer pockets Front organizer top pouch with reflective light loop Vertical storage pocket with dedicated audio port