Herman Miller Aeron Mesh Desk Chair Medium Size B Fully Adjustable -Read. Please look at all the photos for the condition of the chair. The seat mesh is fraying a little on one side of the seat area as indicated in picture 3. The fraying does not affect comfort or seat area functionality. The lumbar support although intact, its cracked on both sides please see pictures 4 and 5. Besides that, the chair is in great condition.