Save your lungs for the hike with the Pack-A-Pump. The Pack-A-Pump is ultralight, compact and directly threads on to your Alpacka Raft valve to ensure that your boat is always running at optimal pressure. Built in storage in the plunger handle means that your repair and Cargo Fly maintenance materials are always at your finger tips. The Pack-A-Pump is NOT compatible with other brand's valves.