QUALITY MATERIALS: Sturdy chair has heavy-duty metal base. Home Office Chair It have passed the test of Classic-3 gas, SGS and BIFMA!, which is a guarantee for your personal safety. Office desk computer chair. ERGONOMIC DESIGN: The Home Office Chair backrest adopts a design that simulates the curvature of the human spine and is equipped with a waist support. Mesh Design has trong breathability, relieve the sweating of your back. The 360-degree rotating wheel and chair can be more flexible on the workstation. Office desk computer chair.