The ultra-warm carefully crafted high-altitude climbing mitt alpinists depend on. Updated with Pittards™ goat leather, its performance technologies are tanned into the material giving it an everlasting grippability while maximizing dexterity and durability summit after summit. Primaloft Gold™ insulation is fused with a NASA-developed aerogel technology for the highest-performing synthetic insulation that's warmer than ever before – without adding extra weight.