Herman Miller Aeron Chair Mesh Headrest New Fits A B C Size. This is a headrest that fits all Herman Miller Aeron Chairs but the mesh matches the classic aeron mesh it has a black mesh and very dark grey almost black frame that matches the graphite colored classic aeron. It will fit on the remastered chairs but the mesh will not match. Head rest goes up and down and swivels as well (see pics). Come with an Allen wrench to attach it to the back. Headrest is New Fits A B C Size.