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Mountain Equipment says:
Developed for the cutting edge of Alpine style climbing; the optimum combination of warmth, protection and minimal weight.
Informed by feedback from some of the worlds best Alpinists and extensive R&D work this is the jacket for the hardest and most committing lines in the high mountains. A GORE-TEX INFINIUM drop outer provides proven additional warmth and weather resistance whilst the Super Alpine Hood gives unrivaled protection.