Take the pain out of sitting all day with this Pressure Relief Memory Foam Seat Cushion Filled with deluxe viscoelastic memory foam, this cushion provides extra support when sitting Takes the pressure away from your joints and helps to promote upright posture Use it as extra padding on desk chairs, car seats, wheelchairs and any other type of chair Waterproof cover has a zip closure so it can easily be removed for cleaning Measures 18 x 16 x 4 inches Save 83% and get seated comfortably on this Pressure Relief Memory Foam Seat Cushion