For an off-duty ensemble, go for a blue chambray long sleeve shirt and a white crew-neck t-shirt — these items fit nicely together. To bring a bit of zing to this outfit, complement your ensemble with dark brown leather desert boots. So as you can see, it's very easy to look on-trend and stay snug when colder weather hits, thanks to this outfit. This combo is a huge inspo to anyone who wasn't sure about wearing casual outfits as an over-50 gentleman.