Mid-back work chair is designed to provide comfortable support for those who spend more than half the day at their desk or computer. Breathable mesh back delivers responsive seating for exceptional comfort. Arms adjust in height & width to adapt to various body sizes. Functions with simple, understandable controls include pneumatic seat-height adjustment from 17-1/2″ to 22″ high from the floor, seat-glide mechanism, back-height adjustment, 360-degree swivel, dual-action synchro tilt, & tilt tension. Synchro-tilt allows the back to recline twice as fast as the seat. As the back reclines, the seat remains relatively level, promoting leg circulation & ergonomic function. Design also features Tectonic black fabric upholstery on the seat, a five-star base & swivel casters. Weight capacity is 300 lb. Mid-back chair meets or exceeds applicable ANSI / BIFMA standards.