Why not consider teaming a teal gilet with jeans? As well as very comfortable, these two pieces look awesome when combined together. To bring out a refined side of you, throw brown suede casual boots in the mix. Casual outfits for older gentlemen aren't actually that hard, as you see here.
Fashionable and practical, this relaxed casual combination of a teal gilet and jeans will provide you with wonderful styling opportunities. Put a fresh spin on an otherwise classic look by finishing with a pair of black leather work boots. This getup shows that even in your fifties you still have a wide range of sartorial options.