These mittens are constructed with innovative waterproof fabric from Japan and contain 100% responsibly sourced premium down. These are down-filled puffer mittens with a cozy brushed lining and exterior speed clips that allow you to attach them together. They're filled with 100% responsibly sourced, 700+ fill-power premium down that provides ultra-warm, lightweight insulation. This version is made with Rainstop™ — waterproof and windproof fabric with a soft feel and 2-layer construction. This fabric is sourced from a Japanese mill that specializes in performance fabrics.