Ergonomic design the human ergonomic design back naturally fit the human body with back curve. You will not feel tired even sit for a long time. Mid, back executive mid, back chair features a pu leather brown chair. Cooling material seat up straight designed back for the natural curvature of a person’s back. Sponge seat covered with pu leather the sponge padded chair will give you the feel of comfort. It give you the comfortableness and mid back support that you need to complete a day’s work. Adjustable height the height adjustable chair quickly adjusts to fit. Independent seat controls allows for the backrest and seat to be adjustable specifically to each individual providing maximum support and comfort. High quality metal base beautiful and stable metallic sliver painted metal base. 360 degree swivel dual wheel casters is rolling smoothly on floor.