For an ensemble that's very straightforward but can be dressed up or down in many different ways, dress in a dark brown blazer and a turtleneck. For something more on the classier side to finish off this getup, complete your outfit with brown suede chelsea boots. Keep this ensemble in mind come warmer days, and we guarantee you'll save a lot of time trying to pick out a look on more than one occasion. As a 60-year-old gentleman, you're sure to like this getup.