If you're on the lookout for a relaxed casual yet on-trend ensemble, try pairing a beige sweatshirt with brown chinos. If you're hesitant about how to round off, a pair of slip-on sneakers is a fail-safe option. Can you see how very easy it is to look dapper and stay snug when cooler weather arrives, all thanks to combos like this? Now that's how you keep it casual in the style department at 40 plus.