You' ll give up on them air matresses first time one ends up flat in the middle of the night an' you suffer thru a sleepless night on the cold, hard ground. Happend to me in ' 82. One night was enough. Them pool mattresses are history in my book. 4" thick foam is the most comfortable. Bulky, but you can top load it. I got a thermorest now. But I also used the 1" closed cell stuff.