95% Cotton / 5% Lycra Small Waist: 28-30", Medium Waist: 32-34", Large Waist: 36-38", Extra Large Waist: 40-42" Comfort and class walk hand in hand when you're wearing Calvin Klein underwear. Calvin Klein's Cotton Stretch 3-Pack Fly Front Trunks are made from high-quality stretch cotton and have a square-cut design with longer legs for a flattering masculine fit that lasts throughout the day. The contour pouch, complete with a functional fly, is roomy and adds emphasis to the male profile while the mid-rise elastic waistband has a repeating Calvin Klein logo.