The Piriformis Seat Cushion was designed and tested by professionals with the goal of creating a piriformis syndrome pain relief cushion that is both comfortable and convenient. Our unique design provides first class comfort from many of the common causes of sciatic nerve related pain while allowing the cushion to be folded in half and carried or stowed away in the lightweight carrying bag. The Piriformis Seat Cushion is a great option for anyone looking for a seat cushion to relieve piriformis and sciatic pain when sitting, driving or using a wheelchair. It is designed with the user in mind and incorporates best-in-class soft select memory foam, ergonomic design, piriformis relief cut-outs, ergonomic contours, tailbone and coccyx cut-outs, built-in carry handle & lightweight carry bag, convenient foldable design, it unzips for cleaning, and was built to last. Contoured to support and evenly distribute your body weight the Piriformis Seat Cushion's unique patented design removes pressure from the piriformis muscle and sciatic nerve providing relief for sciatic pain, piriformis syndrome, relieving spinal pressure, pain, muscle fatigue, and leg tightness. The Piriformis Cushion can help with the following conditions: general sitting relief and comfort, piriformis syndrome, piriformis pain & tightness, sciatica & sciatic nerve pain, tailbone pain, outer hip pain, numbness in the leg, and posture. It's foldable and portable design makes it perfect for use in the car, office, home or in a wheelchair. Foldable Piriformis Cushion relief from your sciatica, coccyx, and piriformis pain. It makes a great gift for anyone who is looking for piriformis syndrome relief. The cushion is 19x15 inches when unfolded. Don't spend one more day sitting in pain!