Viva High Back Ergonomic Nylon Base PU Office Chair with Padded Flip-Up Arms Ergonomic high back Bonded Leather office chair, designed to provide the perfect lumbar support and comfortable sitting experience Adjustable armrests, tilt tension and built-in Lumbar Support give extra relaxation Synchro tilt mechanism makes the user more comfortable during work hours High quality Nylon base and Nylon casters added to office working flexibility Weight capacity: 250 pounds. We provide free component-exchange in two years