This Contract Mesh Task Chair comes with a premium open breathable mesh back that will keep you cool and comfortable during extended periods of work. The height adjustable arms provide comfortable and versatile arm rests that can suit your personal preferences. The contoured 4" high density foam seat cushion provides added comfort. The chair has a three-paddle, multi-function tilting mechanism, which allows the seat and back to be independently adjusted and locked in any position throughout the tilt range. The adjustable tilt tension control knob, which is located under the seat, allows you to customize the tension of the tilt. 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. The weight capacity of this chair is 275 lb., and the seat adjusts from 19"-22H".