This combination of a grey crew-neck t-shirt and navy jeans is impeccably dapper and yet it looks casual enough and ready for anything. Our favorite of a great number of ways to finish this look is a pair of grey suede low top sneakers. This ensemble is a pretty smart option, especially for fall, when the mercury is starting to drop. This ensemble illustrates that as a 30-something Millennial guy, you have a wide range of dressing options.