True Innovations - Bonded Leather Manager Chair - Black Office chair with Memory foam that molds to your body's curves allows for maximum comfort & support Black bonded leather Manager Chair Waterfall seat edge lessens pressure on legs to reduce overall fatigue, instead giving comfort and support Seat height adjust function customizes the seat height so your knees are at a 90 degree angle for proper circulation Tension Adjust knob adjusts the amount of pressue needed to recline the seat