The Patagonia Untracked Pant is a waterproof, breathable ski and snowboard pant that uses 3-layer GORE-TEX ePE Performance fabric. A soft, solution-dyed flannel backer manages moisture against the legs. The recycled nylon face fabric stays supple yet durable. What Our Gearhead(R) Experts Are Saying:"Opening the side vents on a long climb releases heat from the waist to above the knee. The vent zippers are waterproof, so I can leave them cracked when the weather turns. The cut moves with my legs on the way up and again on the way down, so one pair covers the whole tour."