Add comfortable, signature styles of underwear to your drawer of essentials with Calvin Klein. Shop men's briefs, trunks, boxers and more, each featuring the classic Calvin Klein waistband. Standout customers can stock up with a number of multipack options available across some of Calvin Klein's most popular men's underwear ranges. Available at Standout in a variety of sizes, from men's S to XL, Calvin Klein offers men complete comfort, style and minimal sophistication thanks to their simplistic design. Browse the full Calvin Klein men's underwear collection.