Just a plug for my sister-in-law....
She works with autistic children and designed this awesome shirt where the mittens are part of the shirt so the child won't loose them, or complain that they had to wear the mittens. The shirts are made of fleece and come in a variety of colors/sizes.
My niece and nephew both have one and love them and I'm sure that I'll have one on my little guy when he gets older.
If you have little ones, take a peek. You can put water-proof mittens over them if you need to.
Her Etsy store: mitten08
Let me know what you think!!!