A multi colored plaid long sleeve shirt and blue chinos are the ideal way to infuse extra cool into your casual wardrobe. For an on-trend hi/low mix, add a pair of navy and white athletic shoes to the mix. It's a viable option when it comes to putting together a well-coordinated outfit for in-between weather. Think it's hard for over-40 gentlemen to master modern casual outfits? This combination is hard proof of otherwise.