Calvin Klein Cotton Classic Underwear Men's Fit 5 Pack Brief Black NB1425910 Brand New with Box. 100% Authentic. The Calvin Klein original. First introduced in 1981, this is our most iconic men's underwear style. Designed with the original Calvin Klein logo waistband, this timeless brief is made from pure cotton for breathable comfort. Full back coverage. Full rise waistband sits at the regular level, above hip. Functional fly. Soft, flexible logo waistband retains shape wear after wear and stays put, without too much compression. Machine wash 100% cotton Imported