Features: 1. Turns any ordinary chairs into swivel ones, reducing the strain, stress, and sprain on you when getting in / out of the seat, wheelchair, car, or any kind of transportation. 2. Especially suitable for elderly, pregnant, disabled, people with back, hip, leg, tailbone, muscle pain suffers and difficulties, post-surgery patients, and those who is physically challenged, suffering from backache, waist, and lower body soreness, stiffness, or injuries. 3. Large rotation disc, the ultra-thin and firm design makes it portable and light weight. Handy to carry to office or travel. 4. The non-skid base is soft, comfortable, and stays securely in place while the pad rotates with your body and helps posture correction and spinal alignment. 5. If there is any problems, please feel free to contact with us. Specification: Size: 40*45*3cm Material: cloth +EVA Notice: 1.Due to the different monitor and light effect, the actual color may be a slightly different from the picture color. 2.Please allow 1-3cm differs due to manual measurement. includes: 1 x Cushion