ERGO21 LiquiCell Coccyx Seat Cushion, Aid for Tailbone Pain Relief, Sciatica Pain, Back Support | Donut Like Butt Pillow for Long Hours Sitting at Home/Office Chair (18" W x 17" L x 2" H)

Now comes in four sizes Regular, Large, Large Deluxe and Extra Large. There are hardly any cushions out there that can accommodate individuals who are on the heavy side. This is a big plus. A small cushion cuts off circulation under the thighs for larger users. We have added LiquiCell Blood Flow Technology - Four Liquid filled membranes - Two under the tail-bone and two under the thighs to prevent sores and skin breakdown from vertical pressure. A video on our website explains the technology. This technology is also used in hospital beds for burn and stroke patients who cannot move. Also, it is used in recliners for Dialysis Patients who have to sit long hours for treatment. Our cushions are made in USA. We use Custom Formulated High Resilience foam that retains the shape after repeated sittings. Enjoy a solution that surpasses air, gel & foam. Read the reviews of our ERGO21 Sports Cushion without the cut out and ERGO21 Original Cushion with a contoured shape. We studied the various coccyx cushions out there and after pouring through thousands of reviews, went to the drawing board to come up with what we feel is the best Coccyx Cushion which can be just rotated around and used as a regular cushion, when the cut out is no longer needed :)