Contemporary executive chair features an ergonomic mesh back to provide exceptional back support and prevent body heat and moisture buildup. Posture mechanism/lock adjusts the back angle independently of fabric seat and can be locked in a number of positions. Other functions include pneumatic seat-height adjustment, 360-degree swivel, tilt, tilt tension and tilt lock. Chair glides easily on the 27" nylon five-star base and hooded, double-wheel casters..