【100% Memory Foam】Seat cushion are made of 100% pure high-density premium durable memory foam which are no odor and never go flat 【U-shaped Design】Adopt U-shaped ergonomic designed by alleviating pressure on the coccyx /tailbone and relieving various lower limb pain 【Fit for sedentary people】Promotes healthy posture and spine alignment, perfect for drivers, teachers, students, people with wheelchair, pregnant women, office workers, etc. 【Widespread use on anyplace】This seat cushion provides comfort soft sitting for office chair, desk chair, car seat, airplane and even wheelchair 【Washable velour cover】The cushion's breathable cover is machine washable and can be easily removed using the zipper for easy cleaning which ensure sanitary Highlight More comfortable Cushion not only provide support hardness, but also give you with more soft comfort than donut pillow. promotes healthy posture Can be used to improve bad posture and relieve leg pain while driving or sitting for long periods, enhancing your comfort while retaining its density. Relieve pain Relieve various types of lower extremity pain, including Sciatica, Low Back, Lumbar, Tailbone, Prostate, Hip, Piriformis, Spine, Leg Pain, Backaches, Hemorrhoids, and post surgery or pregnancy pain relief. 3D Breathable Washable Mesh Cover Anti-Sweat absorbent material keeps air circulation to keep comfortable all day long with removable cover which is easy for cleaning. Assists natural hip alignment The contoured shape supports your hip alignment natural curve for proper spinal alignment and to promote healthy posture. Helps relieve pressure caused by long sitting sessions Suitable for office chair, computer chair, gaming chair, car seat, recliner, any home chair or a seat on bus, airplane or train. Specification: Filling: 100% polyurethane foam Cover material: 40% bamboo, 60% polyester Coccyx Cushion size: L45 x W7 x H43cm