Reviewed by Richard Wiseman - 8th Sep, 2020 Amazing! I was very sceptical that this would provide enough support but somehow it does. We've previously taken air beds that you have to pump up, but they don't provide very even support; these somehow do. Even though they're only maybe 3cm thick, when your body weight is spread across the mattress, it still keeps you off the hard floor. Surprisingly, even without adding extra air by blowing into the valve, it's firm enough to sleep on after five minutes auto-inflating! We'll continue using these in future, definitely.