The Viper VX Buckle Up Charger Pack takes versatility to another level. This pack consists of one main compartment and one front compartment, both of which are expandable. It is VX Buckle Up compatible and will work in conjunction with any Viper VX Buckle Up system. Adjustable shoulder straps (removable). 2 x expandable. Bladder/comms outlet compartments. 1 x Main grab handle. D-ring attachment for chest rig compatibility