The Harrison mesh-back task chair is both comfortable and good looking. The contoured mesh back provides excellent lumbar support and air circulation. Curved armrests and an amply padded seat add to the comfort of this chair. A comfortable black mesh covers the seat and matches any decor. The seat back reclines and is tension-adjustable to meet the needs of many users. Chair functions include swivel, height, arm and back adjustments. Explanation of functions- 360 degree swivel: Chair is able to rotate 360 degrees in either direction. Seat height: Chair's seat can raise and lower allowing the user's feet to remain flat on the floor. Arm Height: Raise and lower to support users forearms and reduce neck and shoulder stress. Tilt tension: Allows user to adjust the amount of force that it takes to adjust the seat back angle. Back Flex: Chair back reclines as the seat remains in a fixed position. All Regency chairs are backed by a 5-year limited manufacturer's warranty on chair bases and frames and a 2-year limited manufacturer's warranty on chair mechanisms and upholstery.