People claim these are the warmest mittens they have ever worn. They have a thick Berber or plush outer fabric and a 300 weight Polartec lining with interior elastic at the wrist for a comfortable fit.
Measurements below are approximate. If you're not sure of your size, go up a size as mittens don't need to be a tight fit. Size approximates the length finger tip to wrist.
S-7.5" M-8" L-8.5" XL-9"