This is a soft cushion to support the pelvis. It allows you to sit gently. - Material: Soft fabric - Size: 45 x 40cm - Thickness: Approximately 50mm Thank you for viewing. ↑ This is a description generated by AI. It helps when sitting in a chair and experiencing pain in the buttocks. I used this a few years ago, but I no longer use it, so I am offering it for sale. Normally, you would inflate it with air, but the pump is not included. The item will be shipped deflated. Thank you for your understanding.