This Black Ergonomic Budget Task Chair is upholstered in Black tweed fabric. Its fixed arms make for comfortable and natural armrests. It has an upright locking position feature, providing comfortable back support. The pneumatic adjustable gas lift allows for easy seat height adjustment, to help you find the personalized sitting style that suits you and your work environment. The large 27-inch black nylon base provides added stability to the chair. The hooded double wheel casters make it easy to move and shift directions.