This compact hydration backpack can be carried as a backpack, or can be attached to an armored vest, such as the CIRAS, via the MOLLE webbing. The water bladder is secure in place by a Velcro-fastened top, preventing displacement of the bladder. It has the proven bite valve system and has a hydro lock valve, with a capacity of up to 2.5 Liters. Made of 1000D Cordura.