Memory Foam Seat Cushion: The Liffis office seat cushion and lumbar support pillow features premium slow-rebound memory foam that adjusts to your body's curves for better support, reducing pressure on your coccyx and promoting healthy sitting potential. The mesh breathable cover provides good air circulation, so you won't feel stuffy or sweaty when you sit. Say Goodbye to Coccyx Painful: An orthopedic doctor's recommendation - the perfect alternative to donuts and hemorrhoid pillows. The ergonomically designed U-shaped seat cushion keeps the hips and tailbone away from the hard seating surface, preventing pressure on the lower body, can effectively relieve sciatica, arthritis, lower back, hip, spine, post-operative injury or pregnancy pain relief, suitable for 150 - 250 lb crowd. Extra Larger Size Back Cushion Pillow: Liffis desk and chair back cushion has a larger support area than other brands. Simulating the human spine curve and takes on the natural contour shape of your back, providing a more comfortable force area for the back, and can be placed on the back of a car seat or office chair to relieve neck, upper, middle, chest, lower back and spine pain in any position. Fits Any Chair Seat Cushion Combo: Both the seat cushion and backrest feature a non-slip rubber bottom to ensure they stay securely in the seat. Adjustable shoulder straps keep the back support pad in place and prevent the lumbar pillow from slipping. Perfect for most office chairs, gaming chairs, sofas, car seats, SUVs, trucks, wheelchairs and even on the go. The removable and washable cover keeps the cushion set clean and tidy at all times. Best Gift for Men & Women: The memory foam seat cushion and chair back cushion is the perfect gift for family and friends for Christmas, Valentine's Day, Mother's Day, Father's Day, Birthday, Wedding, Housewarming. If your loved one needs to sit for long hours at work or drive, give them this cushion set to experience unprecedented comfort and all-day relaxation.