Mesh back designed to prevent body heat and moisture build up. Breathable mesh fabric seat with ample padding. Upright locking position. Adjustable tilt tension control. Pneumatic gas lift seat height adjustment. 25" nylon base. Hooded double wheel casters. T-arms. Black upholstery with a Black frame. 25"W x 26-1/2"D x 40"H Overall Dimensions.