Calvin Klein 1981 Trunks. Elevate your essential collection with these 1981 trunks by Calvin Klein Underwear. Crafted from a soft cotton-blend fabric, these trunks are infused with a hint of stretch for maximum breathability. Decked with an elasticated waistband accented with the signature branding, these trunks are perfect to be worn for throughout the day.• Trunks• Elasticated waistband• Calvin Klein branding• Soft construction• 92% cotton, 8% elastane• Machine washable (30 degrees)