Men’s trunks Men’s trunk underwear made from nylon/spandex Machine wash Imported Calvin Klein underwear style number U7071F Sporty-cool style at its best. Made from a silky-soft microfiber blend, lightweight Calvin Klein Prostretch Reflex men’s trunks wick away moisture to keep you cool and dry during even the most rigorous workouts. An ideal pick for playing sports or comfortable everyday wear, Calvin Klein trunks for men feature a colorful body, contrast Calvin Klein logo waistband and ergonomic seams around the pouch and leg openings to prevent the trunks from rolling up. The athletic design of this men’s underwear also fits smoothly so you can layer without the bulk.