DESIGN: 2.5 Liter HydraPak reservoir features a slide closure for easy cleaning and a locking bite valve to prevent leaks Easily bring along any tools, food, or equipment with 8 Liters of cargo storage Exterior zippered pocket for quick access Made with a perforated foam harness/backpanel and articulating shoulder straps to keep you cool and comfortable Integrated waist strap for added stability when carrying heavy loads Reflective trim and tail light attachment loop for better visibility Designed with a hands-free ReTrakt magnetic hose return system SPECIFICATIONS: Dimensions: 9.8 x 6.3 x 17.3 inches Volume: 8 L Weight: 1.21 lbs. Reservoir Capacity: 2.5 L Material: Nylon