This mesh task chair supports you in comfort when you''re working long hours to get the job done, in your dorm, at the office and at home.The transparent mesh back allows air to circulate, keeping you cool no matter how high the pressure gets. The swivel seat is padded with 2 inches of CA117 fire retardant foam and covered with green mesh upholstery. Built-in lumbar support helps prevent back strain and muscle fatigue. Raise and lower the seat using the pneumatic seat height adjustment lever, conveniently located below the seat. The heavy-duty, nylon base with dual wheel casters makes it easy to roll across the floor.Whether you''re sitting in class, studying for a final exam or working to beat a tight deadline, this stylish chair will keep you cool and comfortable throughout your busy day. Overall Dimension:21.50"W x 22.50"D x 30.50" - 34.50"H and Seat Size: 17.5"W x 16.25"D, Seat Height:15.5" - 19.5"H.