Breathable mesh back with adjustable lumbar support! Lumbar feature supports your lower back and enhances the natural curve of your spine. Adjustable height arms padded for elbow and forearm comfort . Tilt controls for ideal positioning. Features deluxe synchro tilt control that keeps seat level with floor as backrest reclines. 3-position tilt lock option lets you lock in the most comfortable position. Tilt tension controls the ease and rate of recline so the chair responds properly to your weight and strength. Heavy-duty angled 5-star base for stability. 360 swivel and dual-wheel carpet casters for easy maneuverability. Weight capacity tested to support up to 300 lb. GREENGUARD certified - certified for low chemical emissions: UL.COM/GG - UL 2818. Ranked in two tiers: Certified and Gold. Less harsh chemicals - made with fewer harsh chemicals, or safer chemicals than typical alternatives, helping reduce your use of and exposure to substances that may be more harmful to your health and the environment.