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Men's Base Layer Pants: Average savings of 66% at Sierra

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Thermals & Base Layers for Extreme Cold

Merino Wool Base Layer Mens Bottom Pants 100% Merino Wool Thermal

Russell Men's & Big Men's Heavyweight Fleece Baselayer Thermal

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Russell Men's & Big Men's Heavyweight Fleece Baselayer Thermal

Cabela's E.C.W.C.S. Lightweight Base Layer Pants for Men