1. Apply high-density strength fabric, soft for long sitting. 2. Ergonomic design: S-shape designed backrest, breathable mesh back, lumbar support, adjustable headrest, adjustable armrests, adjustable waist pillow, 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 widely used at the office, home, computer room.