Product Description Material: plush + PVC liner Dimensions: inner diameter 10 cm, outer diameter 38 cm Usage: Sedentary/Decubitus Sores/Coccyx Fracture/Coccyx Pain/Pelvic Floor Pain/Pregnancy Packing contents: 1 * Inflatable cushion 1. Our cushions are great cushions for hemorrhoids; pregnancy donut pillows; donut pillows for tailbone problems; and medical donut pillows. You can take it anywhere. 2. Comfortable and Durable: Soft and durable plush + PVC lining material conforms to your body and provides excellent cushioning while preventing punctures and leaks. Holds up to 198 lbs. 3. Easy to inflate: Inflate quickly and easily via mouth or the included air pump. Other pillows are difficult to inflate and can cause shortness of breath. You can always inflate your pillow quickly and easily with our included air pump. 4. Easy to clean: The cover of this pillow is made of polyester fiber, which is hypoallergenic and can be washed, providing you with a safe and clean pillow. The built-in inflatable nozzle, unlike the metal nozzle, avoids the patient's discomfort when using it. 5. MULTIPLE USES: This pillow is perfect for traveling. The entire set fits into the included carrying case so you can take it with you wherever you go. You can use it at home, in the office/work, on vacation, in the car and on the plane.