It is an old Eskimo rule that you need to keep your wrists warm in order to keep your body warm - and if you look at your wrists and have a look at the veins that are running just under the skin, you will agree.
mittens are available in Polartec 200
Polartec Windbloc and PolartecWindpro for $25
Retro X for $25
or double layer with the Polartec 200 on the inside and the Polartec Windpro or Windbloc on the outside for $40
sizes extra small to extra large and then custom.