Herman Miller Aeron Chair Size B – Lumbar Support – Fully Adjustable – Excellent Condition. This is one of the most well-known ergonomic office chairs, designed for comfort, breathability, and long-term use. Mesh is clean and supportive. Normal light wear from use. All adjustments working properly. Height adjusts smoothly Tilt function works Arms are solid and stable. Ergonomic mesh design (cool and breathable). Adjustable height, tilt, and armrests. Authentic Herman Miller Aeron – ergonomic mesh, breathable, all adjustments working. Perfect for home office, studio, or long work sessions.