Mountaineers climb The Pfeifferhorn in Utah's Wasatch Mountains during the dead of winter to train for Mount Everest, because the conditions resemble Everest in the spring. The Canada Goose Summit Jacket is ideal in such a place. It is the lightest jacket in Canada Goose's Altitude Line, but incorporates many features you'd want in a classic down parka. The Summit is stuffed with premium 750 fill power Hutterite white duck down, which provides superb warmth and loft, and the ISO Peak 2 layer ripstop nylon with Durance laminate keeps harsh weather out. Canada Goose has rated the Summit for cold temperatures, ranging from 5 through 13F There are overlays on the sleeves and hood to protect from moisture, while the hanging lining is for wind proofing. No matter what challenges you face during variable weather, you'll be covered literally by the extended back cut of this jacket. When you are marching through technical terrain, you don't want to fuss over adjusting your jacket, so the Summit has a removable two way adjustable hood with single hand adjustment and a single hand adjustable and elasticized hem draw for ease of use while in action there are also adjustable cuffs for ease of movement. You can then easily grab all the essentials you've stashed in the generous amount of pockets, like the inner security pocket with wire port and zip closure, the lower drop in mesh pocket, or the two handwarmer pockets with reverse coil zipper closures. There's recessed Lycra stretch cuffs with thumbholes for extra warmth. And to top it all off, Canada Goose slapped on some reflective tape for added visibility. Training for Everest all of the sudden got a lot easier.