SET - Includes BOTH seat and back cushion. The Healthy Spirit Lumbar Back Cushion provides comfort and support and is made from contoured memory foam. The Healthy Spirit Memory Foam Seat Cushion is ergonomically designed to reduce pressure on the tailbone and coccyx while offering proper support and a comfortable seating surface. Coccyx cushion core is supportive memory foam offering support and proper immersion and pressure relief. Plush velvet cover offers a comfortable and cozy seating surface. A non-slip bottom ensures the cushion stays firmly in place. Together the seat and back cushion provide hours of comfortable seating. Use as a car seat and back cushion, office chair cushion, wheelchair cushion, home or anywhere for comfortable seating. Perfect hemorrhoid pillow. Ideal for back pain, post surgery, pregnancy, prostate treatment, and butt pillow after surgery. Sciatica cushion. Use as a chair cushion for pressure relief. Super comfortable, it will become your favorite desk chair cushion set.