For a layering piece that packs all the heat without the weight, throw on the Duofold(R) Men's Flex Weight Crew. This Varitherm base layer shirt is lightweight and gives a second skin feel. Made with Champion Vapor technology with X-Temp(TM), it dries faster as your body heat rises, allowing you to stay warm, but cool at the same time. The moisture wicking properties promote a quick drying material that will keep you comfortable all day long in the Men's Flex Weight Crew. FEATURES: Varitherm base layer Lightweight, second skin feel Champion Vapor technology with X-Temp(TM) Moisture wicking Quick drying Ultra soft brushed back fabric Close-to-the-body fit flexes and stretches for mobility Chafe-resistant flat lock seams