Mazama’s Hatch 3 Liter Tactical Hydration Reservoirs are mission-ready and feature a rapid fill & lock fill port, with extra durable, made-in-the USA bladder film. Hatch’s push-button, "SnapCap" offers convenient one-hand fill-up and sure-fire sealing every time with a built-in lock switch. The taste-free film is 0.40 mm thick (30% more than our recreational reservoirs) making it extra durable and strong. Hatch includes our advanced "UltraValve" bite valve mouthpiece that offers a free-flow mode. The "UltraValve" can be oriented right or left so it can be worn over either shoulder. Turn the valve straight ahead for shut-off during transport. A quick twist of the sheath opens the valve for streaming flow. The free flow mode also works great for drying out the bite valve and drink tube. A central baffle allows the bladder to maintain a low-profile, and a quick connect exit port facilitates pack loading. The strap-mount drink tube clip provides convenient drink tube access on-the-go.