1. Adjustable tilt tension control and upright locking position.This chair can also be tilted by rocking back and forth and lifting or pushing down on the knob under the seat. 2. Pneumatic height adjust lever.The seat height can be adjusted according to individual sitting habit. 3. Breathable mesh back designed to prevent body heat and moisture build-up.The mesh back ensures breathability and flexible support. 4. This ergonomic office chair will not add stress to your over long working hours anymore! This ergonomic design promotes good posture and boost your work productivity. 5. The faux leather is padded with a soft cushioned seat and is easy to clean.