COMFORTABLE - Thanks to this state-of-the-art office chair’s numerous adjustable features you can be assured of finding a comfortable seating position just for you. You can adjust the headrest height and angle; the lumbar support height ; the seat height; the backrest tilt; and the tilt tension,Our seat is made of 3 inches high density foam with waterfall-edge design, providing larger support area and disperse pressure on hip and thighs. BREATHABLE MESH - The breathable mesh back on this ergonomic office chair provides support while keeping your back cool and comfortable. Cool air circulates through the mesh keeping your back sweat-free and allowing you to sit in the chair comfortably for longer periods of time compared to traditional chairs. BACK SUPPORT - Our adjustable elastic backrest can perfectly fit your spine and significantly ease the fatigue and pain of your back. Also, our durable metal-core armrest with bigger, Provide you more comfortable arm suppor.