The Auclair Icecrusher GTX Warm Mitts are built for serious mountain conditions, combining a durable PFAS-free goat leather shell with flexible 4-way stretch fabric and outseam construction for all-day comfort. A GORE-TEX ePE waterproof membrane and recycled 3M Thinsulate insulation deliver dependable warmth, breathability, and dry-hand performance from first chair to stormy laps.