A slate-colored two-button doesn't have to say corporate boardroom (or Pee-wee's Playhouse). This one by Louis Vuitton has the summertime versatility of khaki: Dress it up with a patterned shirt and a bold tie and it's smart enough for the office. Wear it with white sneakers over a V-neck T-shirt and you're ready for a night out. Its light-as-air wool gives it perfect warm-weather wearability, making it a smart choice even beyond Labor Day.
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