1. Apply high-density strength fabric, soft for long sitting. 2. Ergonomic design: Meet the needs of the user's different heights, adjustable lifting and reclining, breathable mesh back, adjustable armrests, S- shape designed backrest, lumbar support, SGS certification gas lift, and strong metal frame. 3. Sturdy 360°silent non-slip nylon wheel, glide on the ground smoothly. 4. Assembling instruction can help you easy to assemble and is widely used at the office, home, computer room.