The Scarpa Alien Alpine Touring Boot splits the difference between full-blown rando racing boot and hardcore tourer, with a carbon-infused Grilamid shell and cuff that are plenty light enough to crush the skin track while still handling their business on steep faces and in shotgun couloirs. The Alien's most distinguishing feature is the fit. Not many boots can boast a micro-adjustable BOA closure system, but the Alien uses it to secure the foot smoothly and evenly, completely eliminating pressure points and dead spots.