This casual combination of a light blue long sleeve shirt and charcoal jeans is a tested option when you need to look cool but have no time. To give your overall outfit a more casual spin, complete this ensemble with tan athletic shoes. When it's one of those bleak autumn days, what better to brighten it up than a seriously stylish outfit like this one? Men who are curious how to wear cool casual style as you pass the big three-oh, this combo should answer your question.