Herman Miller Classic Aeron Chair - Fully Adjustable, A size, Adjustable Lumbar, Carpet Casters Classic Aeron Chair Size A provides optimal ergonomic support for people up to 5'4" and 150 pounds; lumbar pad adjusts to fit the curve of the lumbar spine Patented Pellicle woven suspension textile weaves together two unique materials with elastic properties to make the seat and backrest flexible and breathable for enhanced comfort without the need for padding or traditional upholstery Kinemat tilt mechanism allows the chair to move with your body;pivot points align withthe hips, knees, and ankles for a natural recline motion Features tilt limiter with seat angle adjustment, fully adjustable arms, adjustable lumbar, graphite base and frame, black armpads, and carpet casters The Herman Miller Aeron Chair shipped and sold by Amazon is backed by our 12-year, 3-shift warranty. Ships fully assembled. Made in the U.S.A