Office Chair, Ergonomic Massage Function Height-Adjustable Rocking, BeigeERGONOMIC DESIGN: The ergonomic design adapts perfectly to the shape of your body and supports your back during long working hours. The upper is made of breathable woven fabric. WITH VIBRATION MASSAGE: This vibration gaming chair with a USB interface features two massage points in the lumbar region. A side pocket and a remote control provide added convenience. HEIGHT ADJUSTABLE: You can adjust the seat height to your individual needs. A gas spring