Inflation sacks...this hasn't come up yet. Blowing up a large pad takes a lot of time and air. At high altitudes, that air can be hard to come by. The sacks really do work. The problem is that every brand has it's own valves and the sacks have to match the valve. Some valves just don't lend themselves to any brand of sack. If your pad comes with an air sack or if they sell one to match the valve, I highly recommend it.
