- Men’s onesie underwear
- Machine wash
Simplify your style with the new onesies design from Undergear®. Combining a men’s undershirt and thong into one effortless piece, these sleeveless onesies are the ones to count on for ultimate comfort—and a great extra layer when you need it. Made from soft cotton jersey with a touch of stretch spandex, these men’s thong onesies from Undergear® also offer a step-in style for easy access.