This Techni Mobili Sport Racer Series Executive Office Chair features a height adjustment mechanism and heavy duty nylon base. With locking tilt control and an adjustable tension knob, you can configure this stylish chair to your liking. This racer style chair is made of durable nylon with a comfortable padded seat upholstered in our premiere synthetic leather, Techniflex. Techniflex is an upholstery leather and polyurethane for added softness and durability. Flip-up armrests provide another way to customize this chair to your needs. The 5 star nylon base features locking non-marking casters. This chair can fit users up to 220 lbs.