Our heavyweight thermal pants from Rock Face help hold in your body heat and make a warmer choice when the weather turns cold. Made in the USA of American-grown cotton, they're a true American classic. crafted with deep air pockets to help trap body heat full-cut design allows for freedom of movement elastic waist double-knit ribbed cuffs 9-oz. American-grown cotton washable made in America more sizes: regular, tall, extra tall, big