Steel When you're constantly moving around to get comfortable in your office chair it breaks your concentration and reduces efficiency. This vibrant, adjustable swivel task chair is just the ticket to get you comfortable, focused and back on track. [_Our chair conforms to ANSI/BIFMA standard X5.1-17_] Ventilated mesh, mid-back design with built-in lumbar support Adjustable, mesh upholstered, padded waterfall swivel seat Contemporary adjustable swivel task chair for office or home use PRODUCT MEASUREMENTS: Overall Size: 25.25"W x 27"D x 36-40"H; Seat Size: 19.75"W x 19.25"D x 18-22"H; Back Size: 19"W x 19.5"H; Arm Size: 7.5"H from seat