A tailored light-blue shirt like Zegna's has a timeless formality that's just as appropriate in the boardroom as it is on a smart date. It's cut slim from crisp cotton-poplin and has a sharp cutaway collar with removable stays. The mother-of-pearl buttons are a marker of superior quality. Shown here with Ermenegildo Zegna suit, John Lobb shoes, Charvet tie, Turnbull & Asser Pocket square.