The Beautyrest® Silver® Lumbar Supreme™ air bed offers incredible comfort, durability and advanced guest bed technology. The 18" Lumbar Supreme™ is separated into 3 distinct zones, allowing you to adjust each to the exact level of support you need in the head, lumbar and foot sections of the bed. Powerful, yet quiet, built in electric pumps rapidly inflate and deflate so you can have the comfort you need at a moment's notice.