Firm and Supportive: Offering a medium/firm level of firmness and able to support adults up to 240 lbs, the donut measures 17.5" x 14" with a thickness of 2.75"; the high resilience foam will maintain shape and ensure durability day after day Ergonomic Comfort: Use our donut pillow for tailbone pain relief, hemorrhoids and coccyx pain, sciatica, pressure sores, postpartum essentials, after surgery and for a sitting pillow for chairs; engineered to ensure comfort day after day on any chair Orthopedic Design: Our doughnut pillows are engineered with Comfort Support memory foam and BounceBack technology, with U-shape cut outs to provide pressure relief; allow some time for adjusting to the firm density foam as it contours to your shape Portable and Versatile: Lightweight for use at home and on the go and suitable for most seats, on an office chair or car seat, airplanes, in stadiums or in a wheelchair; functional and durable with a removable, machine washable cover Physical Therapist Endorsed Brand: We have the seal of approval from leading physical therapist, founder and owner of Therapy Network, Inc., Bob Schrupp, PT, MA and Brad Heineck, PT, C.S.C.S. In the Press: As Seen On CBS, FOX, NBC, USA TODAY, Health, Bob & Brad Physical Therapy. Trusted by over 1 million satisfied customers; the high quality seat cushion is the perfect gift for loved ones