Warm Warm Warm
Got these for my wife whose hands are always cold when snowboarding. Even in moderate temperatures her hands are cold and these mittens kept them warm in 10 degree (F) temps. Very little dexterity with these mittens to the point that they generally come off to connect snowboard bindings. The sizes are much larger than average Marmot gloves and mittens. An XS would be fine for most women and the Small - Medium would fit most men. Overall very happy with these, but if you have anything but the coldest hands they are probably overkill for skiing / snowboarding on most days.