How to Use: 1. Use a mirror as a reference to position the device correctly. You can use the two nylon straps in the front to adjust the fit. 2. Before inflation, push the blue wheel on the airlock down away from the hand pump. 3. Use the pump to inflate to your preference, then roll the wheel back to lock the air in. 4. Use at most for 2-3 times per day, up to 30 minutes per session. 5. Deflate by unlocking airlock and twisting open the screw connected to the pump.