Cover fits included 1-quart Canteen perfectly, but can also be used to carry just about anything similarly sized. If you don't want to carry the Canteen, the Cover also works as a NOD pouch, general purpose pouch, or ammo carrier. Quick-release flap secures gear tight. MOLLE compatible straps make it easy to add this to your vest, harness, belt or backpack. A cool, super-useful find made to tough U.S. military specs.