This office chair will give you an edge on comfort with its contoured cushions and adjusting capabilities. High back office chairs have backs extending to the upper back for greater support. The high back design relieves tension in the lower back, preventing long term strain. The locking synchro tilt control allows the chair's back and seat to recline at different rates, increasing the angle between your torso and thighs. The waterfall front seat edge removes pressure from the lower legs and improves circulation. Chair easily swivels 360 degrees to get the maximum use of your workspace without strain. The pneumatic adjustment lever will allow you to easily adjust the seat to your desired height. The adjustable armrests take the pressure off the shoulders and the neck, which minimizes the risk of pain. BT-661-BK-GG Color Black Finish Black Nylon Upholstery Black Fabric Made of Fabric, Foam, Metal, Plastic Contemporary Office Chair High Back Design Black Fabric Upholstery Built-In Lumbar Support Double Paddle Control Mechanism Back Height Adjustment 2-to-1 Synchro Tilt Adjustment Waterfall Seat promotes healthy blood flow Swivel Seat Pneumatic Seat Height Adjustment Height Adjustable Padded Arms Heavy Duty Nylon Base Dual Wheel Casters CA117 Fire Retardant Foam Capacity 250 lbs. Some Assembly Required Warranty Info 2 yr Parts Overall Dimensions 25.50 W x 25 D x 39 46.50 H Seat Dimensions 21 W x 17.75 D Back Dimensions 18.50 W x 25.50 H Seat Height 17 21.25 H Arm Height from Floor 24 31.50 H Arm Height from Seat 6.75 9.50 H