Your hands sweat because the latex forms a vapor barrier that prevents the water that your hands perspire from going anywhere. Your hands are warmer because there is in effect another layer in the system. If the 'liner' material was silk, or thinsulate, or wool for that matter, your hands would still be warmer in your gloves but the sweating effect would be less or non-existent because these underlayers breathe. There are latex booties for your feet and you could probably find them in a surgical supply. Feet perspire less than hands so a vapor locked barrier isn't the worst thing I can think of, but I have to think that there are silk or thinsulate liner socks to wear under regular thermal socks to provide and additional layer. BTW. Just last week someone offered me the half-dead chemical warmer they had been using on their drive in to our rehearsal. They know that I was going to be riding home, 8 miles in sub-25* weather. I politely declined not knowing that the warmers had been used and were thus going to go in the trash anyway. So I took them, more as a gesture than any thought that the things would have any use to me. Hmmmm. If this is what more than half spent chemical warmers can do inside gloves on a cold night I may have to look into getting some as an emergency back up for cold snaps. I don't have any gloves that really work well below 30*and I have some expedition type that are just as thick as any ski-glove you've ever seen but without the zippers and pockets that make real ski-gloves so clunky.

H