A red polo and white jeans are bona fide menswear essentials if you're figuring out an off-duty closet that matches up to the highest sartorial standards. And if you need to immediately dress down your look with one single piece, why not complete this ensemble with a pair of olive athletic shoes? A vivid example of transitional style, this look is a staple come warmer days. This outfit shows how to keep killing it in casual dressing as a guy in his 30s.