Inflation
These boats are designed to be very lightweight and compact. The inflation is done via an "Inflation Bag", basically a bag about the size of a pillow case with a PVC valve on one corner, and the other end is open. You connect the valve, then "gather" air and close the open end and squeeze the air in. I can inflate mine in under two minutes. There is a small mouth valve to "top it off" with, also , after you put in in cold water, it loses some pressure, so then you can add a little more via the mouth valve. The "Inflation bag" weighs almost nothing. Very cool. I wish I had one of these twenty years ago.