Men’s briefs Men's underwear made from rayon / cotton Machine wash Imported C-in2 style 3413 C-in2 has refreshed one of its most popular men's underwear collections -- the Bamboo line, now re-named Zen. These super comfortable men's briefs from C-in2 now have even more cotton and a little bit more stretch for a more natural feel against the skin. Stretchier than previous versions, the C-in2 Zen Color Slider Briefs come in your choice of Plum Wine Purple or True Blue. Choose your favorite hue or stock up on both!