A polo and chinos? It's an easy-to-create ensemble that you could rock on a daily basis. If you don't want to go all out formal, complete your outfit with grey athletic shoes. Think you can't pull off cool casual style as you reach your 50s? This combo is a vivid demonstration of otherwise.
For a casual ensemble, try teaming a polo with chinos — these two pieces fit pretty good together. Finishing with black and white leather loafers is a guaranteed way to inject a dash of polish into your getup. This combo should clear any doubts you had about dressing casually over 50.