An air mattress is an inflatable mattress, usually made of some sort of plastic. The deflated mattress can be rolled up and carried or stored relatively easily, making air mattresses a popular choice for camping trips and for temporary bedding at home for guests. Typically they are inflated either manually (by blowing into an opening) or with a pump.
Sizes are normally the same as with traditional mattresses: twin, full, queen, king, etc., and standard sheets should fit, albeit sometimes more snugly.
Some individuals who relocate frequently prefer an air mattress over a traditional mattress due to its portability.
See also:
Camping,
Lodging