Calvin Klein Small Cotton Stretch 3-Pack Men's Trunk U2662GS ( Black/White/Grey). Calvin Klein Cotton Stretch 3 Pack Men's Low Rise Trunks Size Small, Comes with Colors: Black, White, Grey, Item Material is 95% Cotton, 5% Elastane. Machine-washable in warm water (greater than 30°). Waistband is elasticated with logo branding all around. The size small measures 28"-30" around the waist.