The HailSuit is fully inflated within 5-8 minutes, to its maximum width of 25 centimeters, by its built-in 12V pump. The inflation time depends on the model. The pump has three settings; Inflate, Deflate and OFF. Make sure all four valves are firmly shut whilst inflating! After the HailSuit is fully inflated, it will keep its perfect pressure for 4-8 hrs. After this period, you can add pressure to the HailSuit (if required) by turning on the pump for a few seconds. When your HailSuit has done its job, you can open the four valves and press “Deflate” on the pump. Your HailSuit can be used multiple times, as long as it’s stored neatly.