Used lightly mostly been unused for years. The Herman Miller Aeron Mesh Desk Chair in Medium Size B is fully adjustable and features a carbon mesh Pellicle material for breathability and comfort. This high-quality office chair is designed with a focus on ergonomics, including lumbar support to promote healthy posture during long hours of work. Made in the United States, this Aeron chair by Herman Miller is a top choice for those seeking a durable and stylish seating option for their office space.