Set of 2 Stackable Rolling Office Chairs with Mesh Backrest-BlackErgonomically curved mesh backrest conforms to spine curves Soft padded seat improves sitting comfort With ventilated holes under the seat for heat dissipation 4 universal casters allow the chair to move with ease Heavy duty metal frame withstands 330 lbs of weight Chairs can be stacked for storage in compact corners Easy to put together thanks to the details instruction