If you’re still wearing soggy, stinky cotton thermal longies, you’re seriously missing out. Because now there’s Buck Naked® Base Layers with all the no-pinch, no-stink, no-sweat comfort of our best-selling underwear. In diamond-knit 4.4-oz. 93% nylon/7% spandex, they flex along with your every move and pull sweat from skin for a drier feel all day long. Low-profile seams won’t chafe your pits, and improved rib trim stays snug and stretchy – even after a winter’s worth of wear and washing. Longer shirt body keeps drafts from blasting up your back. And the rollicking patterns let you grin and bare it all winter long!