New and improved, these premium KOMBI heated mittens provide up to 8 hours of extra heat to stay warm. Heating technology provides warmth around the backs of hands, fingers, and thumbs, depending on the desired level. The warm wool lining and breathable PRIMALOFT® Gold P.U.R.E. ™ insulation in these ski mittens provide superior comfort, even when the heating system is not activated. Enjoy your ski runs all day long. The Warm it Up mittens rank at level 4 on our Warmth Factor Scale.