Featuring reliable ergonomic support, the two plastic lumbar support design behind the backrest provides an extra comfortable experience for long periods of sitting, Strong frame is designed to support your back always in correct seating way, protecting your back and waist. Selected fabric reduces heat build-up and makes make you sit with good ventilation. Pneumatic controls let you easy raise or lower your seat to be suitable height with your computer desk. Strong Metal base in coated with 5 wheels, it will let you easy to move in your room, the heavy-duty base with noiseless mesh & Foam, casters ensures stability and mobility. Upholstered back and seat, plus padded arms, in mesh for all day comfort. Office chair has a Heavy-Duty metal base, great stability & Mobility. 360-degree swivel, heavy-duty base and smooth-rolling casters make a superb stable structure, the whole chair can rock back and forth, you can personally adjust the chairs height of the chair to match your needs, Perfect for relax during your busy working days. Design based on user comfort, with high quality mesh, comfortable with foam and an ergonomic high-back rest.