[Premium Memory Foam]Our office chair seat cushion is made of 100% pure memory foam, soft and firm, uses your own body heat to adapt to your curves, ergonomic "U" shaped hollow design for superior comfort, effectively support the coccyx, relieve the hip pressure caused by sitting for long periods. [Convenience]Non-slip rubber bottom keeps the butt pillow in place even when moving on the seat. The machine washable zippered breathable cover is easy to clean, just remove the cover and toss in the washing machine. Built-in handle for easy transport. [Multiple Uses]This office chair cushion supports the recovery of spinal problems such as back issues, disc herniation, coccyx injury, sciatica, etc.great for office chair, car seat, airplane seat, gaming chairs, bleacher, wheelchairs. Comfortable for business travel, sporting events, or elderly. [Material Safety]All parts of the seat cushion are certified safe and harmless for human health with no additives. Colour:grey Material:Memory foam+PU Size:46x36x8cm Package Contents: 1 x Seat Cushion Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.