Stay warm and cozy with the Hanes Men's X-Temp Thermal Underwear Unionsuit. It features extra-soft thermal knit and no-rub seams for a comfortable fit under your clothing. The Hanes thermal unionsuit is made to stretch and move with you even when you are very active. A versatile piece, it's good for sleeping, layering under clothing or simply lounging around the house. Available in several distinct colors, the men's thermal unionsuit comes in different sizes as well to provide the fit you desire. They slip on easily and can be donned whenever you want to keep the chill away. Since they are made to hug the body, they are not bulky and can be worn under many outfits. Buy a size larger for a looser fit.