Cushion Low-Resilience Seat Cushion Posture-Improving Seat Cushion Latest Fifth Generation Seat Cushion Only used a few times, so it's in beautiful condition! The cover is washable, so you can use it cleanly! Bowling-shaped hollow design reduces the burden on your buttocks. Excellent breathability, making it less likely to get stuffy even when sitting for long periods. The rear end has an M-shaped design, avoiding direct contact with the seat cushion when sitting, reducing pressure on the tailbone, and providing excellent comfort. The arc-shaped sides gently fit the buttocks, distributing pressure. The W-shaped design at the front gently fits the thighs, reducing pressure on the thighs and allowing for comfortable sitting. 【Product Specifications】 Size: (approx.) 36cm (length) x 45cm (width) x 4-7cm (thickness) Material: Core: Polyurethane (high-quality low-resilience urethane) Cover: Surface: 100% polyester (highly breathable mesh material) Back: Anti-slip and anti-adhesive particles.