Yangming Ergonomic Office Chair, Mid Back Mesh Desk Chair with Lumbar Support for Home Office, PinkThe open mesh design creates a breathable, well-ventilated backrest. The office chairs backrest with ergonomic lumbar support will help you keep in the right position during prolonged working. The padded mesh seat is thick and resilient. Made of high quality thick sponge and breathable mesh cloth, preventing body heat and keeping your hip and legs sweat-free. Pneumatic controls make it easier to raise or lower the seat. This home office chair can support up to 250 lbs of weight. The PU casters provides great mobility, suitable for hard floors, carpet and more, without noise during swiveling and the wont scratch the floors surface.