Our reliable memory foam seat cushion, made from premium high-density memory foam materials and adopting ergonomic U-shaped cut out design, is designed to assist in most sitting pain caused by sciatica, herniated discs, tailbone injuries, pregnancy, hip pain and hemorrhoids and meantime promote a health posture. Additionally, it comes with a breathable and washable mesh cover to accelerate air circulation and keep you cool and comfortable all day and it can be used on any office chair, computer chair, armchair, wheelchair, car seat etc.