The powder is falling, there are free refills, and you plan on going bell to bell. Breathe easy with the Arc'teryx Men's Iser Pant; you won't have to go inside for anything less than a tasty beverage. Waterproof 3-layer Gore-Tex has taped seams to keep the snow right where you want it--under your feet--but still allows any body heat to vent out. When you decide to traverse out to some fresh goods, zip open the side vents and keep on pushing. Plus, it doesn't matter if you're spending the day making figure eights or hucking cliffs while the landing is soft, the articulated knees allow full range of movement and the internal belt makes sure they fit just right. They're durable on the outside, fending off tears from rocks and trees, but soft on the inside thanks to a brushed back fleece lining.