Cooling mesh back: added comfort with breathable fabric that promotes air circulation Center-tilt and tilt-tension control: adjust chair and seat back recline for greater comfort and work preferences Ergonomic back frame provides increased support and comfort while fixed arms provide upper body support Engineered for maximum comfort and durability 250 pound weight capacity The Essentials by OFM seating collection is where quality meets value. The ESS-3040 task chair features a supportive high back constructed of breathable mesh. The generously proportioned seat is upholstered with durable sandwich mesh. It also offers simple and intuitive controls such as pneumatic seat height adjustment, 360 degree swivel, tilt tension and tilt lock for added customizability and comfort. The contemporary tapered arms add to the modern appeal. The comfort, stylish look, and price point of this chair make it a perfect addition to the office, whether at work or at home. This chair meets or exceeds industry standards for safety and durability, and is backed by our Essentials by OFM Limited Lifetime warranty.