Each Paco Pad has a water tight air valve that will allow you to roll it up and keep the air from getting inside. Therefore when you want to go to bed, simply press the side release buckles to release the straps, and open the valve. The Pad will inflate itself. It needs no extra air to make it work and a small puncture from a cactus needle or a valve left open will not affect a successful night of sleeping. The foam is extra dense and firm. The density of the foam allows the pad to be rolled up many times without breaking down the foam inside.