Consider pairing a black sweatshirt with black jeans for a hassle-free look that's also well put together. You could go down the casual route on the shoe front by rounding off with a pair of athletic shoes. When it comes to casual clothing for 60-year-old gentlemen, this ensemble looks nice on most gents.
Why not team a black sweatshirt with grey sweatpants? These items are totally functional and will look amazing when combined together. A pair of athletic shoes immediately ups the style factor of your ensemble. Those who wonder whether you can still wear cool off-duty outfits as you head into your 60s, this combination should answer your question.