IAFA - White / Grey Ergolux High Back Ergonomic Office Chair with Adjustable Arms, Syncro Tilt, Heavy Duty Metal Base, Adjustable Lumber Support & Adjustable Headrest Take care of your body as you work. The IAFA - White/Grey Ergolux High Back Ergonomic Office Chair offers adjustable arms, syncro tilt, a heavy duty metal base, adjustable lumbar support, and an adjustable headrest.