Used for one month while teleworking. No stains or tears. IKSTAR Cushion Low-rebound Seat Cushion Brand: IKSTAR Features: Ergonomic Color: Black Size: 1 piece (x 1) Material: Memory foam Shape: Butterfly 【Hollow Design Healthcare Seat Cushion】 This low-rebound seat cushion provides a comfortable sitting experience without worrying about buttock fatigue. The hollow design with a bowling shape prevents stuffiness even when sitting for long periods. By sitting in a way that conforms to the shape, you naturally maintain a forward-leaning posture, gently straightening your back. 【Ergonomic Design, Reduced Burden】 The arc-shaped sides gently fit the buttocks, distributing pressure. Raising the rear end absorbs pressure on the tailbone, providing a comfortable sitting experience. The linear design reduces pressure on the thighs, making it less tiring to sit for long periods. 【Breathable Mesh Material, Non-Slip】 The cover uses mesh material for excellent breathability. The cover is removable and washable, making it easy to care for. It is also non-slip, so you don't have to worry about it falling off the chair. 【RoHS Standard Compliant!】 To provide safe products, we have conducted strict European standard testing (RoHS) and passed the tests. You can use it with confidence as it does not contain harmful substances. (This product test number: IKS-003) 【Product Specifications】 Size: (approx.) 38cm long x 45cm wide x 2.5-7cm thick Material: Core: Polyurethane (high-quality urethane) Cover: Surface/100% polyester (breathable mesh) Back: Non-slip and anti-adhesive particulate material. Please refrain from purchasing if you are sensitive to used items or home storage.