Let that cold air be the least of your worries. Down-alternative Thermore® Ecodown® insulation is built into the Nike Mittens to keep you warm during your chilliest outdoor workouts and adventures. Additionally, an extended double-layer cuff gives extra protection on top of the ribbed cuff, keeping warm air in and cold air out. And don't worry about wet gloves, because the water-repellent, durable nylon helps keep you dry and comfortable.