Arctic traveler alert: This boot is packed with 600 grams of Thinsulate, the most insulation in any non-mountaineering boot we tested. Add a high-loft fleece layer and a Gore-Tex liner, and you get “one of the most comfortable boots I’ve ever worn in the cold—down to -25°F,” says one Colorado tester. The low-profile leather/Cordura upper is pressure-point-free under snowshoes bindings (many boots this warm have hardware or seams that can rub), and testers report the high cuff and stiff sole felt stable and supportive with 45 pounds, without feeling overbuilt or sloppy.
Testers in Rocky Mountain National Park praised the traction on icy and wet trails, thanks to fiberglass-impregnated pads interspersed with the lugs. A TPU insert cradles the heel and wraps up the midfoot to the ball of the foot, enhancing stability and rock protection.
Warning: Hot-footed testers found these boots too toasty in temps above freezing.