Capacity: 700 Cubic Inches. Fabric: 100% Heavy Duty Ballistic Rip Stop. Bladder: It Sprays! 70 oz., quick-release valves for drinking tube and pressurization tube for easy refill and bladder removal, slide top for easy refill, cleaning and drying. Zippers: Heavy Duty Size 8 Coil Zipper. I-Pod Ready Compartment w/ Waterproof Zipper Garage. Waist Belt: Removable System. Shoulder Strap: Ergonomic Fit, Terraced Overlay for Adjustable Tube Configuration and Power Bulb Configuration, Industrial Load Dispersement cut and padding. Chest Strap: Integrated slider chest strap. Additional Features: Plug & Play Reservoir Tube Connector, Compression Straps, PVC Reinforced, Reflective Zipper Pulls, Eco Rig Back Pads, Air Drive Ventilation, Heavy Duty Nylon Pack Handle