Certified for commercial use (BIFMA standards); Weight Capacity: up to 300 lbs Back and seat upholstered in durable and breathable commercial grade mesh fabric with a thick cushioned seat Ergonomic curved back rest and textured arm rests to provide a comfortable posture Convenient lever for adjustable seat height and 5 nylon castors for smooth mobility Seat height: 17"-21"H; Seat dims: 17.5"Lx17.5"Dx16"H (back rest); Arms: 12"Lx2"Wx7.5"H Upgrade your study/work space with this modern ergonomically designed mid-back juvenile office chair in a chic white and black finish. BIFMA certified, this stylish and supremely comfortable chair has a supportive natural curved back, a thick cushioned seat upholstered in a durable and breathable commercial grade white nylon mesh fabric, with high quality finish black arm rests. The convenient side lever allows you to easily adjust the seat height between 17"-21"high, and the 5 nylon hooded castors on a sturdy base gives smooth mobility across a floor or low pile carpet. Easy to assemble, you deserve to be sitting comfortably and in style as you work hard to finish those school projects!