A light blue short sleeve shirt and shorts are absolute menswear essentials that will integrate really well within your daily casual lineup. Add white and navy athletic shoes to the equation to avoid looking too formal. So if it's a hot afternoon and you want to look stylish without putting too much effort, this outfit will do the job in no time flat. And if we're talking casual dressing ideas for 50-year-old gents, this combination looks good on almost any man.