Calvin Klein 1981 Bikini Briefs. 1981 Bikini Briefs by Calvin Klein Underwear> Ladies bikini briefs> Wide elasticated waistband> Flat lock seams> Tonal stitching> Lightweight> Breathable> Stretch fit> Calvin Klein branding> Body: 80% polyamide, 20% elastane> Lining: 100% cotton> Waistband: 54% polyester, 38% nylon, 8% elastane> Machine washable at 30 degrees