Calvin Klein Women Modern Cotton Bikini Brief Black. This Brief is made from soft superior quality cotton blend for a streamlined fit. Features seamless sides for extra comfort and a cotton gusset. The item runs slightly small. It has the Calvin Klein signature logo waistband. This Calvin Klein Womens underwear is made from 53% Cotton / 35% Modal / 12% Elastane. MPN: f3787e-001. Part of the Core basic ranges in Calvin Klein Women, this is the CK Womens Modern Cotton range. Available in Black and in sizes XS to XL.