Enjoy a pain-free life with ultimate comfort - Our tailbone seat cushion conforms to the contours of your body, making it a great lumbar cushion when driving or working long hours. The back support cushion for the office chair provides relief for back pain and discomfort in the tailbone area. The orthopedic, ergonomic seat cushion - The office chair seat cushion and car cushion features an ergonomic U-shaped cutout. This seat cushion helps relieve pressure on the sciatic nerve, which may reduce back, leg, and buttock pain. Whether used to enhance seating comfort in office chairs or as a car seat cushion, it offers improved support. High quality and easy care - The seat cushion and back support for car and office chair are made of 100% pure memory foam. The cushion supports healthy posture by evenly distributing body pressure. The half donut cushion and backrest cushion come with a removable, washable mesh cover. Versatile and lightweight - Our back support chair cushion includes adjustable elastic straps and can be used with car seats, office chairs, or wheelchairs. These memory foam seat cushions are portable and convenient for travel.