Innovative in its simplicity, ReGeneration minimizes materials and components. The straightforward design leverages flexible, durable and sustainable materials that respond to your movements, providing comfort and support throughout the day. This chair comes standard with Ultra Foam seats, plastic base, adjustable height arms, hard wheels and a dark finish frame. Features: SLIM PROFILE BACK WITH CONTOURED FRAME High performance elastomer Flex Back Net with integral lumbar support. Optional adjustable lumbar support available DESIGNED FOR 270 DEGREES OF SITTING Flex Seat with three sides of seat edge flex and seat depth adjustment. Set-back arms for leg clearance and contoured arm pads for Continuous Lumbar support when side sitting RESPONSIVE PERFORMANCE Weight compensated Dynamic Suspension control with a smooth, synchronized recline and four independent flexors that respond to multidirectional movement. Recline resistance feature for greater upright support This chair has been tested and is approved for use by individuals weighing up to 300 pounds This chair is warranted for 12 years, 24-hour, 7 days a week, multi shift use. More fabric and color options are available; 2Modern makes every effort to accommodate product returns with a generous return policy. However if an item is customized or made to order, such as this product, 2Modern cannot cancel the order after 48 hours of placement or accept a return. Knoll,Modern Chairs,Office,Office Chairs