I was initially a bit hesitant about the very special form of this cushion, but as I travel bcp and I arrived anyway not sleep with the U pillow, I wanted to try and I don ' aps have been disappointed, it is a great surprise! I bought two, the second being for a friend who tried it this weekend by car and he called me on Monday all happy saying "I HAVE SLEPT WAAAW". I appreciate all the more the fact that we can attach either on yourself or on a folder, and you can also fold it to attach it to the bag when deflated, very convenient! I recommend. I do not put 5 stars because I have not tried enough to evaluate its duration in time, but to robust air.