Ergonomic back and lumbar support help kids maintain a proper sitting posture while they study or read at a desk. Mesh fabric on the backrest promotes air ventilation to reduce heat buildup during long sitting sessions. The upholstered seat uses sponge padding with a detachable cushion, and the 17.5 x 16 in seat swivels 360 degrees so kids can easily turn without straining. Height adjusts from 31.5 to 36 in to fit growing kids, and the sturdy PP and PVC construction supports up to 330 lbs.