Briefs by Calvin Klein, Two pack, Made from a cotton stretch fabric, Elasticated waistband, Signature branding, Form fitting design. With a rich company history spanning back to 1968, Calvin Klein originally started life as a coat store in New York City. The now iconic label, famed for their minimalist approach, offers up covetable diffusion lines CK by Calvin Klein and Calvin Klein Jeans, both of which channel the label's inimitable style.