The Authentic(TM) layer for total warmth when the temperature dips. 8 oz. The Authentic Crew from Coldpruf features a dual layer system which provides maximum protection in the most extreme cold. The inside layer is 100% Cotton while the outside layer is a 50% Cotton / 40% Merino Wool / 10% Nylon blend. Rated for very cold to extreme cold. Allows for low to medium activity. Pairs with the Authentic Pant. | Coldpruf Authentic Crew Thermal Shirt in Cream | Size MT