Ergonomic Computer Chair office Chair adopts ergonomically designed S-shaped backrest, headrest and lumbar support, perfectly fit your body line and provide the best comfort for your back. The nylon wheels can rotate 360°freely and slide quietly on any type of floor. Multi-Adjustable Functions5 humanized adjustment features to help you find the most comfortable sitting posture, allowing you to sit for a long time and stay relaxed. Adjustable armrests, lumbar support, headrest, seat height, and swing range, bring you a customized seating experience. Upgraded Quality Materials Computer Chair is made of premium polyester mesh, high elasticity without deformation, more wear-resistant and breathable. The cushion is filled with high-density thick sponge, soft and durable, providing support while keeping it cool and sweat-free, make you comfortable and relaxed.