This Budget Mesh Task Chair comes with an open breathable mesh back designed to prevent body heat and moisture build-up. The breathable fabric seat with padding will keep you cool and comfortable during extended periods of work. The adjustable tilt tension control knob, which is located under the seat, allows you to customize the tension of the tilt. It has an upright locking position feature, providing comfortable back support. The pneumatic adjustable gas lift allows for easy seat height adjustment, to help you find the personalized sitting style that suits you and your work environment. The large 27 black nylon base provides added stability to the chair. The hooded double wheel casters make it easy to move and shift directions.