For an outfit that's worthy of a modern stylish gentleman and casually neat, try pairing a shirt jacket with a white and blue long sleeve shirt. To bring out a more laid-back side of you, complete this ensemble with white leather low top sneakers. As you can see, it's extremely easy to look amazing and stay comfortable when cooler weather hits, all thanks to ensembles like this. And if we're talking casual fashion tips for maturing gents, this getup looks cool on almost any gent.