A white and red vertical striped long sleeve shirt and black chinos are a pairing that every smart gentleman should have in his wardrobe. Get a little creative with footwear and play down this outfit by finishing off with grey athletic shoes. With the departure of winter comes a sense of spring renewal and the need for a summery look just like this one. Gentlemen wondering how to pull off modern casual outfits as you go into your 30s, you have your answer.