This Authentic two layer baselayer was specifically engineered with Coldpruf Insulation System which offers warmth and comfort in very cold to extremely cold weather conditions during low to medium activities. Product Features:Baselayer bottom, Offers WARMTH and COMFORT in very cold to extremely cold weather conditions, Ideal for low to medium activities, Engineered with Coldpruf Insulation System which traps air between both layers of fabric for a natural warmth shield, True sizing - accurate fit, Comfort waistband, Front and back rise, Flat seams, Gussets, Rib cuffs, Designed & knit in the USA, Two-layers for added warmth, Inside layer: 100% combed ring spun cotton, Outside layer: 50% combed ring spun cotton, 40% merino wool (nature's warmest fiber) and 10% nylon.
