Millet One Sport Everest Boot  has made some minor changes by adding more Kevlar. USES Expeditions / High altitude / Mountaineering in extremely cold conditions / Isothermal to -75°F Gore-Tex® Top dry / Evazote Reinforcements with aramid threads. Avg. Weight: 5 lbs 13 oz Sizes: 5 - 14 DESCRIPTION Boot with semi-rigid shell and built-in Gore-Tex® gaiter reinforced by aramid threads, and removable inner slipper Automatic crampon attachment Non-compressive fastening Double zip, so easier to put on Microcellular midsole to increase insulation Removable inner slipper in aluminized alveolate Fiberglass and carbon footbed Cordura + Evazote upper Elasticated collar.

Expedition footwear for mountaineering in conditions of extreme cold.  NOTE US SIZES LISTED. See more here.