PAIN RELIEVING: Our orthopedic tailbone cushion supports pain relief for the spine and buttock by shifting the tailbone when sitting and aligning the spine for healthy posture. The ergonomic seat cushion helps to relieve symptoms of coccyx / tailbone injury, sciatic nerve, lumbar or lower back pain, haemorrhoids, pressure sores or pain during pregnancy. HIGH-TECH: This pressure relief cushion is an innovative gel and memory foam hybrid. Ergonomic design features a contoured compact viscoelastic memory foam core with a cooling gel layer on top. Measures of this large seat cushion: 18.9 x 3.75 x 14.2 in. The ergonomic and large chair cushion is recommended up to a weight of 243 lb and can be easily used as a seat riser or lift cushion to increase the height of any seat, too. VERSATILE: Other standard cushions can be bulky and difficult to manage, but our seat cushion can be used anywhere. The memory foam and elastic gel seat cushion is great as office desk chair cushion at home or at work, computer chair cushion, dining or kitchen chair cushion, sofa seat cushion or wheelchair seat cushion. In addition, it can be used as car seat pillow for driving, airplane seat cushion, orthopaedic pillow for train travel or seat cushion for truck drivers. COMFORT: The gel and memory foam seat cushion is equipped with a non-slip bottom and a breathable mesh cushion cover. That is why you can enjoy our comfortable chair cushion anywhere. Improve bad posture with the help of the cushion which has on top of that a convenient carrying handle. Thus, the seat pad turns into a portable chair cushion. The pressure relieving cushion is delivered in a handy carrying case. HYGIENIC: The breathable mesh cushion cover of this office chair seat cushion is removable. The cover of our sciatica seat cushion is machine washable at 86°F what makes our coccyx pillow very convenient. All materials used for our seat cushions are non-toxic.