New York-based brand Thom Browne caters to the man who doesn't do sloppy casual. Tailoring is key for this brand, which likes to add the odd twist to its lines of often preppy looks that mean many of the pieces are incredibly versatile. The underwear range is just as stylish as the outwear. Boxers in different lengths and designs offer options in cotton, both long and short, with both looser and slim cut shorts available. Stylish as ever, this is men's underwear that completes an outfit on the inside, whether you opt for the checks, block colour or bold white.