Best thermal underwear & base layers for extreme cold

I tried six pairs of thermal underwear. These are the best base layers and long johns for winter sports, extreme cold and outdoor work.

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Pin en Best Base Layer for Extreme Cold

: Clothing, Shoes & Accessories

Rocky Men's Thermal Base Layer Top (Long John Underwear Shirt) Insulated for Outdoor Ski Warmth/Extreme Cold Pajamas (Green Plaid - X-Large)

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