Designed by Herman miller veterans specifically for the Aeron chair, backed by 5 years of rigorous testing and ergonomic research;Manufactured in west Michigan by Herman miller's leading supplier, available commercially through Herman miller dealers;Fits all sizes and vintages of Aeron chairs, exact color match to Herman miller graphite color;Ultra-soft cushion instead of hard plastic perimeter of competitive headrests, comfortable fabric upholstery instead of hair-snagging mesh;Generous cushion allows for side-to-side movement and wearing of headphones