When our only goal is the summit, we rely on the Mammut Taiss Pro HS Hooded Jacket to get us there. The Mammut Dry DRYtechnology Pro 3L laminate provides complete waterproof and breathable coverage for when the weather blows in, while the nylon face fabric fights saturation and moves with us while we reach for a hand hold or scramble across rocky ridges. When the route proves harder work than we imagined, we simply open up the underarm vents to prevent overheating, and reach for a quick snack in one of the many pockets.