- Size: L - Carhartt Base Force Men's Thermal Shirt, designed to provide warmth and comfort in extreme cold conditions - Made with a blend of 81% polyester and 19% wool on the exterior, and 98.4% polyester with 1.6% cotton on the interior - Waffle knit fabric that provides thermal insulation and softness against the skin - Features FastDry technology for quick sweat absorption and moisture control - Rugged Flex technology allows freedom of movement and increased durability - Temperature control to keep the body dry and comfortable all day long - Black heather color, long sleeves, and regular fit, ideal as a base layer for sports, work, or everyday winter use