Lengthwise air bladders provide alternating support in a “two-up, one-down” pattern to provide maximum resident support. Geo-Matt anti-shearing surface to provide a comfortable, therapeutic interface between the air system and the user. Safety edge prevents mattress from collapsing and minimizes entrapment risks. Pump is included. Control unit provides 8 preprogrammed comfort settings, programmable cycle times of 20, 25, 30 and 35 minutes, and low pressure indicator and audible alarm.