If you're in search of a casual but also dapper look, marry a black and white varsity jacket with jeans. Finishing with a pair of multi colored athletic shoes is a guaranteed way to bring a more casual touch to this look. So as you can see, this ensemble is a really savvy pick, especially for weird fall weather, when the temperature is dropping. Wondering how to nail casual style as you slip into your 30s? This combination is a wonderful example.