Helmut Lang bodycon black dress, unique seaming details

Helmut Lang bodycon black dress. Really interesting seaming details! Main body of dress is a robust woven cotton, lined with polyester, exposed back zip. Excellent pre-owned condition - zero visible flaws. Tagged as size 12, however, I typically wear an 8-10 in dresses and this fits me like a glove. Fabric has some give/stretch to it; easy to move & sit and so on.