If you're on a mission for a relaxed casual and at the same time sharp outfit, team an olive long sleeve shirt with cargo pants. White and blue low top sneakers work amazingly well within this outfit. So if it's a summertime afternoon and you want to look dapper without putting too much effort, this getup will do the job in no time. As you can see here, as a 60-something gentleman, you still have a wide range of style options.