Like tiny furnaces for your hands, the Armada Huntla Down Mittens crank up the BTU's using RDS (Responsible Down Standard) Certified 600 fill power duck down on the back of your hands, plus 200 grams of Thinsulate™ insulation in the palms. Those are some hard numbers to top in truly cold conditions, but the Huntla's are ready when the temperatures go skyward as well, with a waterproof breathable Hiporara® insert. Be ready for anything with the Huntla Mitts.