Air Mattress :

Air mattresses use air chambers instead of springs to give support.  The prices of air mattresses can vary greatly on quality and use.  Air beds can range from very cheap ones for camping and temporary places to sleep, all the way to luxury ones.  The prices are generally comparable to that of spring mattresses.  Innovations in the air mattress industry have included the ability to adjust firmness, and the ability to set comfort for either side of the bed.