A polo and a jogger together reads more country-club business casual than gym, especially in a grounded charcoal-and-green pairing like this one. The polo's got real structure through the collar, and the jogger keeps the tapered, clean line of a trouser without giving up any stretch. Picture a casual Friday, no meetings on the calendar that need a real pant. It's a comfortable answer to business casual for the office that doesn't require a real shoe polish.

Finish with white leather sneakers and a canvas belt.