---

Chair cushion

The human body evolved for the purposes of running and walking and not prolonged sitting. Sitting originated as a function related to status and as such chairs were designed to reflect the status of the sitter. Chairs, sofas and the like which have cushions which conform to the user's body in order to avoid pressure points are desirable not only from the standpoint of general comfort, but also for medical reasons to support burn victims and avoid bedsores on invalids. With the increasing number of wheel chair patients, the need for wheel chair cushions which provide for greater prevention of ischemic injury are needed. Chair cushions are most commonly installed on living room chairs, rather than outdoor chairs, because indoor chairs are protected from the environment. Various types of chair paddings and cushions have been attached to chairs to provide comfort and protection to persons seated in the chairs. Chair cushions are supported from beneath by the chair frame, which must have straps, metal plates, bars or the like extending beneath the seat and behind the backrest to support the cushion. Usually, the chair cushion rests independently on the chair frame and can be easily removed from the frame for storage inside. Because the padding material is encased within a layer of sheet or woven material, cushions are readily adapted for surface decoration. A chair seat cushion is usually provided with a means for securing it to a chair as it rests on the seat such that the cushion maintains the desired position. One simple and commonly used method to do this is to employ pairs of the strings which extend from the rear of the cushion, often from the seam. These strings are adapted to be tied around vertical elements of the chair back to anchor the cushion.

---