Adjustable Wheelchair Cushions for Tailbone Pain Relief Cushion, Pressure Relief Wheelchair Cushion, Donut Pillow for Hemorrhoids, Bedsores, Prostate, Tail Vertebrae，Sedentary Wheelchair (Black)[Ergonomic design]Our wheelchair cushions are hollow in the middle to relieve pressure on the hips and tailbone. The size of this cushion (16. 9" x 15. 7 "x 4. 3") is designed for most wheelchairs. Whether recovering from surgery, hemorrhoids, tailbone pain or office work, it's perfect for relieving the discomfort of sitting for long periods of time. [Excellent support] : Our wheelchair cushions are made of high quality memory foam to ensure long