By surrounding weather-vulnerable down with water-resistant PrimaLoft Gold, Outdoor Research ensures the Stormbound Mitts will both stay warm in wet weather and wick perspiration away from the skin. Breathable Pertex Shield+ technology provides waterproof protection around the outer shell, and further guards your hands from wet or melting snow. Finally, a comfy, secure rib-knit cuff with hook-and-loop closure seals out the elements.