Vertical stripes on a knit polo do something most solid colors can't — they read as "sport-luxe" instead of "just a shirt," without you having to try.
The breathable knit keeps you cool through a golf round or a hot afternoon, and the fitted-but-not-tight cut avoids the boxy look that cheaper polos default to. It's the shirt you grab when a plain tee feels underdressed and a button-up feels like overkill.
