Technical and high altitude mountaineering and extreme use in cold environments. External gaiter in stretch nylon and neoprene lining with YKK zip closure, heat-sealed seams and perimeter edge in Pu guarantees protection, support and performance. Inner boot in nylon and Cordura offers protection, support and lightness with webbing closure; Schoeller Soft Shell used in the collar and flex points improves movement and comfort. Gore-Tex Insulated Comfort Footwear lining guarantees insulation, waterproofing and breathability, while the more elastic Gore-Tex Zamba is used in the front gusset. Vibram 1229 Mulaz sole and microporous midsole for maximum lightness and thermal insulation. Adaptable for automatic crampons.