Oh, but it can't be: oh, but it is, and for only about $4,000 you can have a pair of bra and panties made from actual human hair.
The Ananova story
here
The developer was doing hair weaves when he came up with the idea of using hair for a garment. (Well surely he can't be the first, but ok.) He says that it takes three times as much hair as seen to weave a garment, because so many hairs are lost.