This compact hydration backpack can be carried as a backpack, or can be attached to an armoured 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 sytem and has a hydro lock valve. Capacity is 2 Lites. Made of INVISTA CORDURA.