Pressure Relief Seat by C Cushion Lab. Scientifically contoured to cradle your thighs & hip and help you sit upright up on any chair. Ergonomic contours encourage proper posture and a straight spine, redistributing your lower body weight for comfort even during long hours of sitting. Extra-dense charcoal memory foam offers soft and velvety support while remaining odor-free. Take the weight off your tailbone and lower back during long drives or road trips. Great for wheelchair and mobility scooter relief. Standard size - 18" x 15.5" x 4" From a smoke-free but pet-friendly home. see 1st, 2nd, 3rd, 4th, & 8th pics for condition. Interested? Make an offer. 😊