In the advertising world, not much can top Calvin Klein's iconic underwear campaigns. Since 1982, the all-American label has been crafting instantly recognisable logo-laden bras, briefs, and more – in fact, it was the creator of the world's first pair of designer underwear. Today you'll find the same quality, breathable materials, sleek design and branding that have been gracing billboards and magazines for over 40 years.