The Auclair Iceland GTX Warm Mitten maps its insulation instead of layering it on evenly. Recycled Thinsulate sits on the back of the hand for targeted warmth, while Lithermo insulation runs throughout for steady thermal performance that doesn't tip into overheating during hard efforts. An ePE High Performance X GORE-TEX membrane handles the waterproofing and breathability underneath, and a DWR goat leather palm with a PU overlay and silicone grip keeps control and traction solid no matter the conditions. A plant-based Yulex cuff and waffle-knit lining round out a mitten built for high-intensity performance. What Our Gearhead(R) Experts Are Saying:"I've worn these through a full day of hard skiing and never had to pull them off to cool down, but my hands still weren't cold on the chairlift. The warmth sits where I actually need it instead of everywhere at once."