Why Buy Calvin Klein His Holiday Gift Guide Sleepwear? Just what you'd expect from Calvin Klein--the men's underwear line is the perfect combination of simplicity and style. The brand is an innovator in both design and construction. Features like stay-put leg openings, comfortable fit, new fabrics and fresh styles have made it a market leader. Now men can have sexy, great-looking underwear that is as comfortable as it is stylish.
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