To assemble an off-duty outfit with a contemporary spin, pair a light blue short sleeve shirt with a dark brown crew-neck t-shirt. If you need to easily perk up your ensemble with footwear, why not introduce dark brown leather casual boots to this ensemble? So as you can see, it's very easy to look dapper and stay warm when chillier weather comes, all thanks to combos like this. Rest assured this combination is something you can totally wear as a 50-year-old man.