• COMFORTABLE OFFICE CHAIR - The Office Chair has a High-Back padded headrest to relieve fatigue from sitting for a long time. Breathable & Premium mesh construction, which keeps air circulation, accelerates heat and moisture dissipation, lean back with bodyweight can rock the chair from 90° to 120°, the computer chair seat height is adjustable, heavy duty Metal base and nylon casters are smooth and silent that great stability and mobility. Our chair is ideal to meet your needs. • EASY TO ASSEMBLE - The computer chair packing box contains all the necessary hardware and accessories and assembly instructions; The directions are easy to follow and make sure you follow all steps exactly! So, you can easily complete the assembly, about 20-25 minutes. It can be placed well under the table to save you space. • CERTIFICATED - Class 3 Bifma Certificated gas lift Cylinder.