Twenty-eight ounces per pair is damn light for a 6,000-meter-ready, full-gaiter boot. But that didn’t limit its ability to stand up to harsh use in temperatures down to –20°F while scaling icefalls in Vermont, Quebec, and New York. PrimaLoft-insulated, with a stretchy waterproof-breathable gaiter, it was not only “surprisingly warm for the weight,” as one tester reported, but the precise fit also helped testers nail tricky crampon placements even in brittle ice. The Velcro boot closure, gaiters, and softshell cuff at the top are smoothly integrated so there’s no bunching against the foot when you flex your ankle. The semi-rigid Davai is cut lower than many ice boots, and an ample Achilles notch makes it well-suited for mountaineering and long-slog approaches. The Vibram outsole gave solid grip on hard-packed snow, and it has heel and toe welts to be compatible with any type of crampon.