Prove that you do smart casual men's fashion like no-one else by wearing a navy sweater vest and grey cargo pants. For footwear, you could take a more casual route with white canvas high top sneakers. As you can see here, it's extremely easy to look dapper and stay toasty when colder weather hits, thanks to this outfit. So if you're looking for a stylish but also age-appropriate outfit, this one fits the bill.