Like their packrafts, the inflation bag is an original Alpacka Raft design that has set the industry standard. It's a simple ultralight silnyl bag about the size of a large trash bag with an adapter at one end that attaches to the main valve of the boat.ÊThe bag is reversible with adapter fittings for both the new 2017 valves and the 2016 and earlier valves. With practice, it takes less than 90 seconds to fill your boat. Top off with your lungs or a small hand pump.