Description of Deuter Hydro EXP 8 w/ 3L Resevoir Ride longer, knowing that you have plenty of water, food, and parts in this comfortable, expandable sidekick. Features: Expandable main compartment Contoured mesh shoulder straps Mesh hip fins with zippered mesh pockets Easy access for drink tube Airstripes back system Multipurpose elasticised mesh pocket with securing strap for a jacket or helmet Source 3 liter Streamer included Volume: 500-650 cubic inches 8+2 liters Torso: One Size inches Weight: 1 lb. 15 oz. + 6 oz. System: Airstripes Materials: Diamond Lite/Ballistic Lite