The Summit Belay Mitt is The North Face\'s warmest and most durable mitten, designed to withstand winter\'s spent alpine climbing and mountaineering. A waterproof, windproof shell keeps the elements out and the hands protected, while the plush 700 fill down and PrimaLoft insulation provide reliable warmth within. enhancing performance, a thermal-mapped construction and side-seam baffle help keep the heat where it\'s needed most, and the trigger finger liner ensures comfort and dexterity. Complete with a water-resistant goat leather palm and reinforced finger caps, the Summit Belay Mitt was built with cold-weather longevity in mind.