Office chair is upholstered in CaressoftPlus vinyl to give you the look and feel of leather while allowing it to be easily cleaned with a damp cloth. Durable upholstery is ultra-soft and breathable for more comfort throughout your entire day. Pneumatic gas lift allows easy seat-height adjustments to help you find the personalized sitting style that suits you and your work environment. The 27" nylon base offers extra stability to the chair by spreading the load over a larger surface area to help prevent tipping. Hooded, double-wheel casters slide smoothly on floors to make it easy to move and shift directions. Tilt tension control allows you to increase or decrease the tilt tension to accommodate your body weight. Office chair supports up to 275 lb.