Designed for working, studying, or gaming for long periods of time, this ergonomic mesh office chair will provide continuous comfort for your body. Made with breathable and flexible mesh material, the ergonomic back provides effective support for lumbar and back, while the cushioned seat, armrests and headrest offers added comfort. With the adjustable headrest, armrests and lumbar support, you can personlize your own comfort. Equipped with high quality class 3 gas lift for safe lifting, the seat height can be adjusted from 17.7-21.7 inches to match perfectly with different desks. The strong metal base ensures the safety and stability, weight capacity up to 330 lbs. The silent wheels supports smooth and noiseless movement to maintain a quiet working or learning environment.