Engineered Now Headrest for Herman Miller Aeron H3 Remastered – Mineral. An ergonomic headrest designed specifically for the Herman Miller Aeron chair (Remastered models from 2016 or older). This H3 size fits individuals under 5 feet 11 inches. The headrest provides head and neck support during extended sitting sessions and features a free-floating adjustment system with lockable tilt and height settings. Finished in Mineral color to complement the chair’s mesh. 9.7 x 6.9 x 12.1 inches.