Calvin Klein Customized Stretch Bikini. Calvin Klein Customized Stretch BikiniA sleek base layer for all your outfits, these customized bikini briefs from Calvin Klein are an absolute must-have. Made from a stretchy fabric, they are fitted with an elasticated branded waistband for added appeal. Team with the matching bra to complete a coordinated set.Bikini BriefsPlainSingleCo-ordinateElasticated waistbandCalvin Klein branding79% Nylon 21% ElastaneMachine Wash 30°C