The Sissel Air combines the desired upright posture provided by a seat wedge with the dynamic support of an unstable inflatable cushion. It is a dynamic, multifunctional seat wedge for in rehabilitation, at home, at work, or anywhere else where anatomically correct and comfortable sitting is desired. With the Sissel Air, the user not only sits upright but also trains their back and core muscles almost unconsciously. The wedge cushion is available in two different colors. The accompanying mesh cover allows for air circulation.