The ArmorBak is specifically designed to attach directly to the back of an IOTV, MTV, or plate carrier with the CAMELBAK® Direct Armor Attachment System (D.A.A.S.™). The system eliminates the need for shoulder straps and minimizes side-to-side movement. The D.A.A.S.™ system also enables the user to pressurize the included 3L, 100oz Mil-Spec Crux Reservoir for rinsing equipment in the field.