THE NORTH FACEGuantes Nuptse Convertible Mittens – Black: Inspired by the iconic Nuptse Jacket, these Convertible Mittens adapt alpine gear for unbeatable warmth in the city. Like the jacket that gave rise to them, these mittens are filled with lofty, responsibly sourced down to give you game-changing warmth on the coldest days. That combines with Heatseeker™ Eco synthetic insulation in the palm and thumb for guaranteed warmth in variable conditions.