There are few brands which are more closely associated with luxury fashion and eminent style than Calvin Klein. The New York-based label has become famous for its sharp, clean-cut styles and is one of the most prestigious design houses in the world. The designer's signature is understated, classically stylish pieces, spanning everything from chic under-wear to on-trend coats and jackets. Any conversation about wardrobe essentials, has to begin with this most iconic and endlessly innovative of labels.