Comfortable and lightweight: (inner) Made of High Density Supreme Spring-Back Sponge, (Shell) 210T polyester pongee waterproof materials, durable and Abrasion resistant Moisture-proof insulation: in terms of outdoor camping, or in the home rest, the inflatable cushion can effectively isolation ground moisture to you sleep more comfortable, more healthy Easy inflation: With a strong plastic valve, just twist it open, unroll the pad and it will start to inflate itself! A few simple puffs of air later and you have a bed so comfy you will forget you even left home! Before use, please put the air cushion flat. and open the automatic inflatable gas nozzle, let it automatically inflated for 5-10 minutes（Especially when used for the first time）