Just when you thought skinny jeans couldn't get any skinnier, the marketing geniuses at Topshop introduce a new term into our fashion vocabulary: Jeggings. (Or Treggings, to you Brits.) The brand's jean + legging hybrid is knit from cotton, polyester, and spandex, for that suck-it-in, painted-on look without the loss of circulation in your lower half. The Topshop site helpfully suggests that you pair these with an animal-print tunic (tunimal?).