This ergonomic office chair is an ergonomic powerhouse, with an adjustable lumbar support, sliding seat, and height-adjustable armrests keeping your posture in tip-top shape. The vinyl upholstery features built-in antimicrobial properties for those concerned about hygiene and use in crowded areas. This product is shown here with a white backrest and Sage vinyl seat and has a weight maximum of 300 pounds. Quality supported by a limited manufacturer's warranty.