Calvin Klein IDEAL COTTON 3 Pack Womens Bikini Briefs in Black. These underwear feature a pull-on closure, a regular fit, and are a 3-pack. The material composition is 95% Cotton and 5% Elastane. They are bikini style with a medium-rise waist, flat elastic trims, and the CK logo print at the hip. Product Code: 000QD5218EUB1.