100 oz. / 3L Shape-Loc hydration reservoir with Quick Disconnect. Molded back panel with Air Channel Ventilation. Full face or XC helmet carry. Armor carry straps. Internal organizer pockets. Fleece goggle pocket. Removable waist belt. Integrated rescue whistle / sternum strap. Specs: 1600 cu. in. [ 26L ] 19 x 10.5 x 8" [ 48 x 27 x 20cm ].