A 3L Mil Spec compliant hydration reservoir designed for tactical use. Easy to fill, clean and dry, low profile design that delivers 20% more fluid per sip than previous models. Ergonomic drinking solution that provides 2-3+ hours of controlled hydration. Designed to fit into a backpack for effective hands-free hydration. QuickLink hose for quick removal and re-use. Automatic drip lock on the connector, so the reservoir can be moved even when full with the hose removed. Easy-to-use ON-OFF valve with drip-free mouthpiece. Large, very easy to close and open large filling opening allows filling even without removing the container from the backpack. Cleaning through the opening is quick. Inside there is a vibration-absorbing spacer. Made of materials that do not impart tastes or odors to the drink. Thicker HydroGuard antimicrobial surface than consumer models. Materials: Polyurethane, polypropylene and silicone. Delivery includes pre-assembled: Mil Spec Crux drinking reservoir, 11 mm diame