A polo neck sweater and white chinos are among those wear-anywhere-anytime items that have become the fundamental elements in any modern man's closet. To inject a dose of stylish effortlessness into your ensemble, complete your ensemble with navy and white athletic shoes. Keep this ensemble in your head when spring comes, and rest assured, you'll save a lot of time getting dressed on more than one occasion. When it comes to outfit ideas for gentlemen in their 40s, this look looks cool on most gents.