I haven't tried them yet, so if you do, let me know how they work. Okay, that's it for clothes, now on to other equipment you should have to be comfortable in the cold. A good, warm winter bag is expensive, but worth every penny, believe me. If you take care of it, a good bag will last a lifetime. You can get a down bag or one made from Hollofil or Quallofil.
Some people are allergic to down, so be careful.
You should make sure and check the temperature rating of the bag. Of course, the lower the rating, the warmer the bag. Think about how cold you get when you sleep and buy accordingly. Prices can vary greatly from store to store, so shop around. If you have to buy just one expensive thing, this is it, guys.