dr. comfy seat cushion pillow for office chair - memory foam cushion for back pain and sciatica relief,non-slip orthopedic coccyx for tailbone pain-contoured posture corrector for car computer chair dr. comfy name: dr.comfy memory foam seat cushion ergonomic design the seat cushion’s u-shaped design helps suspend your tailbone, or coccyx off hard seating surfaces and provides optimal support for your legs, hips, butt, and back. the groove design is adopted on both sides to release the pressure on the buttocks, soft support, and more comfortable. the curved design with high outside and low inside fits the buttocks and is not tired after sitting for a long time. can help relieve pain from: - back pain & sciatica - coccyx / tailbone - sitting long hours - spinal alignment - herniated discs - pregnancy - piriformis syndrome slow rebound memory foam more durable, higher density, soft-touch, better stress relief, and adjust the human body to a comfortable posture non-slip bottom the seat cushion comes with a non-slip bottom to keep your cushion in place no matter your seating position. color: black weight: 28.2 oz reminder: memory foam cannot be cleaned and sun exposure