We created the Pyre Jacket for frigid sits, when your breath freezes in mid-air but retreating just isn&';t an option. The 160-gram PrimaLoftA(R) Silver fill is perfect when Jack Frost comes calling. Just to be safe, the Pyre is 100 percent waterproof, too - because cold and wet is a very bad combo. Finally, the Pyre&';s articulated arms make it easy to adjust the hood, the cuffs, or get into your interior rangefinder pocket.