Men's Thermal Base Layer Bottoms SF038/SF033/SF039/SF043/SF044/SF040 Size:L Air-Fuzz Hydrogen Fleece Technology：Creates an

Air-Fuzz Hydrogen Fleece Technology：Creates an air-trapping structure that helps maintain a stable thermal environment

uncomfortable fabrics that chafe and trap heat

outperforms 800-fill down in wet cold

Antibacterial technology prevents odors

Men's Thermal Base Layer Bottoms SF038/SF033/SF039/SF043/SF044/SF040 Size:L Air-Fuzz Hydrogen Fleece Technology：Creates anMeet the Beneunder Thermal Base Layer Series built to combat the true discomfort of fall and winter: moisture induced chill. This collection uses next generation moisture heating fibers, rapid dry structures, and dual layer thermal knits to keep your core warm, dry, and breathable through changing temperatures and activity levels. The HydroHeat line features moisture activated fibers that boost warmth by up to 8 C*, helping prevent the cold cling