Calvin Klein Underwear CK One Two Pack Boxed Trunk Boxers in Blue and Black, Cool breathable cotton with added stretch for ultra soft comfort and shape retention with added body defining fit. One pair of boxers is black with the elasticated waistband also in black and the signature Calvin Klein branding in white and one pair is in a blue, black and white grid print design with a blue elasticated waistband and the signature Calvin Klein branding in white. 95% Cotton and 5% Elastane. Brand New Collection Of Calvin Klein Boxers, Trunks and Underwear Live Online UK.