Specification Material: Memory Foam Color: Black, Pink, Dark Gray, Light Gray Size: 463210/7cm / 18.112.63.9/2.8in Weight: 700g Package Include: 1 Seat Cushion Package List Package Include: 1 Seat Cushion 11. Premium Quality Seat Cushion: Our seat cushions for office chairs are made of pure memory foam with no additives, soft but firm, could relief butt pressure effectively from long sitting. 22. Orthopedic Car Seat Cushion: U-shaped design cushion for office chair provides the best comfort while reducing pressure on the coccyx, tailbone and promoting well-shaped posture. 33. Multi-purpose Desk Chair Cushion: Our coccyx seat cushion pillow is suitable for various seats on most occasions, office chair, car seat driver, desk chair at home, airplane seat, outdoor or wheelchair. 44. Keep Its Shape Forever: To sit on our sciatica pain relief pillow for long time but no need to worry about it flattening. The premium memory foam of this chair pad quickly to rebound, always regaining its shape after each use. 55. Assist in Back Pain & Sciatica Relief: Ergonomically designed, provides support and comfort while reducing pressure on the tailbone with the U-shaped cut out and promotes healthy posture. Supports recovery from lower back problems, helps with most sitting pain due to sciatica, herniated discs, tailbone injuries, pregnancy, hip pain and hemorrhoids. Our seat cushion is designed to help relieve pain while sitting however it may not work for all conditions or completely eliminate all pain symptoms.