I ski nearly every day, in temperatures as low as 0°F. I have always used gloves, sometimes with chemical hand-warmer packets, and sometimes electrically heated, but invariably on really cold days I suffer from cold fingers. These mittens totally solve the problem. My fingers are toasty warm on even the coldest days.
UPDATE. I am now on my second pair of these, as my originals developed a frayed seam after approximately 120 days of aggressive alpine skiing. My wife repaired the minor rupture, but I thought I should have a backup pair anyway. The second pair is even better than the first, with the overall length about one inch greater, giving even better overlap of the glove over my parka cuff.
Fantastic Mittens!
