The 3-layer fabric in the Patagonia Untracked Jacket is GORE-TEX ePE Performance, which keeps this ski and snowboard jacket waterproof and breathable. A solution-dyed flannel backer on the inside manages moisture and keeps the interior soft. Recycled nylon on the outside keeps the fabric supple yet durable. What Our Gearhead(R) Experts Are Saying:"Topping out in a storm, I pull the hood over my helmet with the collar zipped, and the visor keeps my view clear for the descent. The pit zips release heat on the way up, so the same jacket works for the climb."