Serta My Fit Managers Chair - Chestnut Brown Leather Arm height adjustment allows the user to raise or lower the arms to help prevent shoulder strain Flip up the arms to work closer to your desk for easier access in a limited work space Waterfall seat edge lessens pressure on legs to reduce overall fatigue Tilt-lock lets you lock into any angle of tilt to fit your comfort needs Tension adjust knob adjusts the amount of pressue needed to recline the seat Seat height adjustable feature customizes the seat height so your knees are at a 90 degree angle for proper circulation The AIR flex-fit lumbar support that flexes with your body and continuously adjusts to your body's position Roasted chestnut brown bonded leather to match home decor