Details: The Carhartt Men's Base Force 100% Cotton Midweight Crew is the ultimate cotton base layer. These 218 gsm/5.5oz 100% cotton long underwear with heathered waffle for year-round versatility. Do you work in an industry where synthetic longunderwear are prohibited? These cotton longjohns might be the ticket. FastDry technology wicks away sweat and Rugged Flex Technology designed for ease of movement will keep you focused when climbing or reaching need to be first on your mind. Smooth flatlock seams for ultimate comfort and concealed thumb loop so the shirt stays put when you are putting on that second layer. Whether on the jobsite or doing an outing in the city, this cotton midweight crew will keep you feeling good and looking good.