The Meridian Wedge Cushion provides comfort and pressure relief to patients spending long periods of time in a wheelchair. With a sloped design that's higher in the front and lower in the back, the cushion helps reduce the risk of patients and loved ones accidently sliding or falling out of their chair. Sized at 18" x 16" x 3", this cushion offers cloud-like comfort to those sitting on it and will fit most standard wheelchairs. The cushion has a weight capacity of 175 lbs. Cushion slopes from 4" in the front to 2" in the back to reduce the risk of accidently falling out. Not just for wheelchairs and to prevent pressure sores, this cushion provides comfort, support and relief to anyone sitting for long periods of time. Large enough to cushion the entire seating area yet small enough to remain portable and convenient. The cover of the cushion is a combination polyester-cotton blend that's removable and washable. Includes a safety strap to securely attach the cushion to a chair while the inner core has a liner to protect the foam.