Dimensions: 21.25W x 21D x 32.75H in.. Made from aluminum, mesh, and polyurethane. Your choice of available colors. Breathable, mesh design. Adjustable design to fit your specific needs. Weight capacity: 250 lbs.. Stay cool throughout your day sitting comfortably in the Alera Padded Steel Stack Chair with Square Back - Black. Its elastic polyester mesh seat and back allow air to pass through to provide ventilation in stuffy work spaces. For added comfort, the seat has a waterfall front edge, which puts less pressure on the backs of the legs and promotes circulation to the feet. Easy-to-reach levers allow you to adjust the height of the seat and the angle of the backrest in seconds, and the padded T-bar arms can be adjusted in multiple directions for a customized fit. The five-star wheeled base is offered with your choice of available finishes.