Made for those who thrive on thin and technical climbs in full alpine conditions, the new M10 is a study in minimalism - and our lightest 3-layer hard shell. The soft, pliable waterproof/breathable nylon ripstop fabric yields superb durability for its weight and protects against monsoon-season precip and summit ridge gusts. Details include watertight zippers, a microfleece-lined neck and chin, an exterior zippered left-chest pocket, zippered handwarmer pockets that serve double-duty by extending into pit zips, and cuffs that adjust with hook-and-loop closures. A single pull adjusts the 3-way helmet-compatible hood (with laminated visor) - it's the little things that make life a joy when dealing with wooden fingers, a gloved hand and torrential spindrift. Slim fit for technical use over light-to-medium layers.