Designed for optimum ergonomic support! Contoured seat and back includes built-in lumbar support. Lumbar feature supports your lower back and enhances the natural curve of your spine. Adjustable padded arms relieves shoulder strain. Take the pressure off your neck and shoulders! Raise or lower armrests to keep your shoulders relaxed and in the ideal position for a variety of tasks, such as typing, filing or talking on the phone. 1-touch seat-height adjustment, 360degrees swivel, and 2 to 1 synchro tilt control with adjustable tension and tilt lock. Heavy-duty nylon base with dual-wheel carpet casters. Chair meets or exceeds applicable ANSI/BIFMA standards. Made by Lorell.