Vue Intensive-Use Mesh Task Chair, Supports Up to 500 lb, 18.5" to 21" Seat Height, Black Vinyl Seat/Back, Black BaseRated for 24 7 use, the back of this intensive use chair has ample support and ergonomic shaping to provide comfort and may help reduce fatigue; breathable nylon mesh keeps users cool and comfortable throughout every workday. Solid construction supports up to 500 lbs. Back height adjustment that may help support correct posture and a reinforced mechanism with back tilt that may help support a reclined position to allow a beneficial rocking motion