EcoNour Coccyx Cushion is designed with a U-shaped ergonomic deign which conforms to the hips. It can effectively relieve back pain, waist pain, sciatica and other problems caused by sitting for a long time. The removable top mesh layer is breathable and can be machine-washed. Cushion has a strong built-in handle which makes it easy to carry. Suitable for most seat, office chairs, and cars.