SWIVEL, ADJUSTABLE HEIGHT MESH OFFICE CHAIR: 360 degree swivel, adjustable height mechanism, flip up armrest. ERGONOMIC DESIGN OFFICE CHAIR: This office chair designed with human-oriented ergonomic construction, providing back support to reduce back pain caused by long time sitting. PASS BIFMA CERTIFICATION: BIFMA is the industry leader in developing furniture safety, durability, and sustainability standards that ensure product performance. Our certified office chair is high quality, environmentally that comes from a responsible manufacturer.