The Men's Mountain Hardwear Kor Airshell Hoodie Jacket is an ultralight shell for high-output pursuits in the alpine. Hike, run, push to the summit. The weather fluctuates, so does your body temperature, but you can't go without. In steps the light and breathable stretch ripstop Pertex Quantum Air fabric, which cuts the wind and deters light rain. The zippered pockets secure small essentials, and the whole jacket packs into its own pocket, making it easy to toss into your backpack or clip to your belt when the weather gets too warm.