Calvin Klein Underwear CK One Cotton Thong in Pink. - size L (also in XS) Calvin Klein Underwear CK One Cotton Thong in Pink. - size L (also in XS) Self: 55% cotton 37% modal 8% elastaneBand: 69% nylon 16% poly 15% elastaneGusset: 100% cotton. Hand wash cold. Elasticized logo waistband. Imported. CKUD-WI183. QF5733. One of the most recognizable designer names in the world, Calvin Klein exudes signature sensuality and sexuality through classic styles and minimalist designs.