This air mattress is apparently not intended to be used. The first time you inflate noticed that the headboard already loses the air after a relatively short time. The main part there was tight. But after about three days using the sea was the air out here. The obvious holes, I tried to connect with the enclosed sealing material. But I had to give up. I bought this mattress because it had good reviews. Perhaps my only such leaks, but it is useful to me just nothing when others are happy with and I absaufe so.