ColdPruf Women&';s Basic Crew Baselayer Black Small Two-layer engineering;Traps air between layers for warmth;Material: 60 percent combed ring spun cotton, 40 percent polyester;Fabric weight: 5.25 oz.;Tagless design;Flat seams;Hemmed cuffs;Available in sizes small, medium, large, X-Largetable.productattributes, Item Category Code: 5500 Product Group Code: 5500B Product Sub Group 1: 5500B2 Product Sub Group 2: 5500B2D Inactive: No