So there's fine (which is, well, just fine) and then there's Ultrafine, and that's way more up our alley. Elle Macpherson's new thong is ultrafine, in fact, Ultrafines. Heat molded seaming is utterly smooth and invisible, flush micro-lace is lovely while also smooth and invisible, and barely-there shape is gorgeous under pretty much anything, while (you guessed it) also smooth and invisible. Fine? Ultrafines.