About the Calvin Klein Athletic Boxer Brief At rest or on-the-go, Calvin Klein Athletic reimagines our past into underwear that adapts to your life. With a future-focused adaptive fabric finish derived from microalgae, this boxer brief provides all day functionality made for an active lifestyle. Made from microalgae, miDori® bio-wicking finish keeps you cool and dry Pima cotton blend with superior durability and softness 4-way stretch fabric for maximum comfort Quick-dry logo waistband retains shape wear after wear Hourglass shape contoured pouch for a sleek fit Machine wash 87% cotton 13% elastane Imported