Man-made outerwear fabrics tend to get lumped together, but don Swiss brand KJUS's 2013 Prime down jacket and you'll quickly begin to believe otherwise. The material – 100% polyester, if you're scoring at home – is super thin and soft to the touch, giving it an almost satin-like feel against the skin. The fill is KJUS premium down, and for a down parka, it's remarkably lightweight, which helps explain the brand's popularity among various Olympian skiers (in fact, the company was founded in 2000 by retired Norwegian Olympic champ Lasse Kjus, with the goal of designing high-quality ski gear for demanding environments).
What's more, the Prime's minimal detailing and understated colors – it only comes in one, olive green with an orange lining – make it stylish enough to wear atop a three-piece suit, and a unique cord system let you achieve a more tailored fit (the detachable hood and inner phone pocket help conceal any lingering sportiness, should the situation demand it). But above all, this is a heavy-duty jacket built for bitter, bastardly cold weather, be it in the Swiss Alps or the Lower East Side. [$999, kjus.com]