Finding a comfortable chair is essential when sitting for long periods at a time. Big & Tall office chairs are designed to accommodate larger and taller body types. This chair has been tested to hold a capacity of up to 500 lbs., offering a broader seat and back width. Covered in black fabric upholstery, this chair will lend sophistication to your workspace. The tilt lock mechanism rocks/tilts the chair and locks in an upright position while the tilt tension adjustment knob adjusts the chair's backward tilt resistance. 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. This office chair features plenty of thick padding to provide greater support. 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. The pneumatic adjustment lever will allow you to easily adjust the seat to your desired height. The silver nylon capped metal base with black caps prevents feet from slipping when resting on chairs base.