If you buy one thing this particularly gruesome winter week, make it a balaclava. No, we're not talking about the flaky, honey-soaked Middle Eastern dessert (although a few of those certainly wouldn't hurt), we're talking the fashion set's favorite new accessory, a somewhat menacing face mask that keeps your face from freezing off while providing a sort of edgy, feeling-cute-might-rob-a-bank-later vibe. After all, a Polar Vortex is no excuse to skimp on the street style - take it from Jackie O.