This modern casual combination of a white crew-neck t-shirt and jeans is super easy to pull together in no time flat, helping you look on-trend and ready for anything without spending too much time combing through your closet. For extra style points, introduce a pair of grey canvas low top sneakers to the mix. This combination is an appealing choice when it comes to an awesome transition look. This getup should erase any doubts you had about dressing casually as a 40-something guy.