Description: Instant Relief From: Hemorrhoids, hip bursitis, broken tailbone, herniated discs, bed sores, anal fissures, ischial tuberosity, fractured coccyx, pressure related to childbirth, vaginal surgery, and sitting for long periods of time that can cause lower back, hip, leg pain Machine Washable Removable Cover: Waterproof inner. Use it again and again, on any seat and any occasion. Simply remove the cover when it is time to freshen up. Widely Used: This sitting donut fits most office chairs, gaming chairs, desk chairs, computer chairs, standard dining chairs, car driver seats, couches, wheelchairs, and recliners. Lightweight and Portable: Use in your home office as a donut seat cushion for tailbone pain, on the road as a car seat cushion or as a wheelchair cushion. Ergonomic: Shaped like a doughnut with an Ergonomic. our conforms to lower body contours providing natural support Size Chart: L:Outer diameter 40cm/15.75inch, Inner diameter 15cm/5.91inch, Thickness 9cm/3.54inch Package Includes: 2 Pieces Donut Cushion(Blue and Green) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!