This is a portable cushion that provides added comfort to the back and seat of any 16" to 18" chair. It cushions the back with 1.5" foam and cushions the seat with a gel-foam pad. This product enhances comfort and prevents pressure sores. It is covered with a stretch, wipe clean Low Shear II removeable cover. The cushion folds up and is convenient to carry with a velcro loop. The cover can be laundered once the cushions are removed.