When we go camping, DH and I each have a foam, self-inflating mattress. Open them out and release the 'Inflate' valve. They gradually inflate to about 10cms depth. They have straight box sides, so no rolling off and a small, cloth hand pump for adjusting the hardness of the mattress. Bought as a pair, they came with a strap to keep them together so they feel like a double bed. We've used them both for years when camping but also individually as spare beds. They are comfortable and, because they contain foam, they are insulated from the ground. To pack them away, open the 'Deflate' valve and roll them up into their bags.