Opt for a dark green military jacket and a white crew-neck t-shirt if you seek to look casual and cool without exerting much effort. Why not introduce a pair of white athletic shoes to the equation for a more casual vibe? As the weather improves, it's time to shed those heavy winter layers and choose something lighter, like this look here. Think 60-something gents can't pull off edgy off-duty style? This combo will prove you wrong.