For year-round versatility, Carhartt Men's Midweight Cotton Rib Base Layer Crewneck top can be worn under work clothes or alone as a fitted, long sleeve shirt. Made of 97% cotton/3% elastane fabric that fights odor, this men's base layer top feels soft against the skin and is breathable. For added comfort, flatlock seams reduce chafing and concealed thumb loops keep your sleeves in place when adding or removing a layer. For a base layer set, pair with UM0270-M-Carhartt Men's Midweight Cotton Rib Base Layer Pant. Model UM0269-M.