Discover the best base layers to keep you comfortable during those long hours outdoors. Keeping the warm air in and the cold air out, these Thermal Underwear Bottoms feature a high-density yarn of super-soft cotton with cuffs and a waistband ensuring no annoying movement during your day. These bottoms have a 50% Cotton / 50% Polyester, 9 oz fabric, ankle length with cuff, elastic waistband and poly bag packaging.