The Aeron Chair revolutionized office seating. BRAND NEW IN THE BOX. FULLY LOADED SIZE B WITH FORWARD SEATING AND POSTURFIT SL. HERMAN MILLER AERON REMASTERED. Seating with its defining design qualities: the pioneering 8Z Pellicle suspension material and its patented PosturFit SL back support, which affords the ideal sitting position-chest open, shoulders back, pelvis tilted slightly forward. Combining a deep knowledge of human-centered design with cutting-edge technology, the Aeron Chair is engineered with state-of-the-art adjustability, including the arms, seat height, depth, and recline, to help you maintain the optimal posture so you can focus on the task at hand. It’ bringing the greatest comfort to the widest range of users. Breathable suspension keeps you cool and comfortable. Adjustable PostureFit SL pads provide lumbar support and stabilize the base of the spine. Harmonic Tilt supports the way you naturally move, for a smooth and balanced recline. Fully adjustable arms (height, depth, and angle) allow for a custom fit. Size B – Medium Height (in): 41Width (in): 27Depth (in): 16¾Weight (lbs): 41 Seat Height (in): 20½Seat Height Min (in): 16 Weight Capacity (lbs): 350. Base Diameter (in): 26½.