I mailed in three pairs of mittens today:
The red and black pair were made holding one strand of red and one strand of black sport weight wool together. They are thick and tough and warm. The ragg mittens are from a commercial ragg wool yarn -- a little thinner than I'd like, but they are 100% wool, so will still be warm. As you can see, I like starting off with a contrasting stripe. I do that in case the mittens end up in the same household or classroom; this way kids can make sure they have both halves of their own pair. I started doing it when I was using up a whole lot of navy blue yarn, and realized that one plain navy blue mitten looks a whole lot like every other navy blue mitten. . . now I do it all the time, even if I'm just making one pair, because I like the way it looks.
More pairs in various stages ranging from just started to not quite finished. . . another small package will go next week.