Aeron office chair revolutionized office seating with its defining design qualities: the pioneering Pellicle suspension material and its patented PostureFit SL back support, which affords the ideal sit – chest open, shoulders back, pelvis tilted slightly forward. Combining a deep knowledge of human-centered design with cutting-edge technology, the classic Aeron chair is engineered with state-of-the-art adjustability, from the arms, seat height, depth, and recline, to help you maintain the optimal seating posture so you can focus on the task at hand. And it comes available in three chair sizes, offering the most comfort to the largest range of users. Breathable fabric keeps you cool and comfortable. The 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. Composed of recycled materials, the production of Aeron in Onyx helps divert plastic waste from the ocean.