A classic combination and one that celebrates necktielessness (that's a word now). You don't wear a cheap suit, so don't scrimp on the turtleneck either—a sweater in a thin cashmere, merino or silk blend will look better against the worsted or flannel of your coat. Shown clockwise from upper left: Reiss, Pal Zileri, Giorgio Armani, Isaia.

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