Cushions aid in the dispersement of pressure, postural support, and body positioning. Without the use of cushions, development of painful pressure sores is common. Wheelchair cushions take off the pressure and both prevent and alleviate the harm caused by these sores. Cushions come in various depths and sizes which need to be accommodated by the size of your wheelchair frame. The actual length of footrests, the height of the chair back, the position of armrests, and other features are influenced by how high or low you will be sitting on a cushion. What kind of cushion you choose will depend on a variety of factors, including how much time you spend in your chair, how much you move around in your chair, and how stable your posture is.