RESPONSIVE COMFORT: Inspired by the natural flexibility of a leaf, the Fern chair is designed to naturally distribute weight as you move. At its core is our patented Wave Suspension system, which mimics the human body and cradles your spine. The three-part back responds to your every move — it’s a total innovation in comfort and support. FEATURES Included pneumatic seat height adjustment, padded 4-dimensional arms, optional lumbar adjustment, back stop, seat depth adjustment, soft casters, tilt tension, control, plastic swivel base. Accommodates a range of body shapes with a weight capacity of up to 325 lb. NO ASSEMBLY REQUIRED: Ready for use directly from the packaging, so you can focus on the things that are most important. QUALITY GUARANTEE: A 12-year warranty promises craftsmanship and quality for years of use. GLOBAL COMMITMENT: Fern is BIFMA Level 3 Certified, which means it satisfies the highest level of environmental standards from the Business and Institutional Furniture Manufacturers Association. The BIFMA certification includes inspection of not only the product, but the manufacturing facility and brand that makes it. Inspired by the natural flexibility of a leaf, the Fern chair is designed to naturally distribute weight as you move. At its core is our patented Wave Suspension system, which mimics the human body and cradles your spine. The three-part back responds to your every move — it’s a total innovation in comfort and support.