The formula for casually sleek menswear style? A navy blazer with khaki chinos. To inject a dose of stylish nonchalance into this look, add a pair of black and white canvas high top sneakers to this ensemble. If it's one of those bleak fall afternoons, what better to spice it up than a sharp look like this one? Those wondering how to sport cool casual looks as you go through your adolescence, this combo should answer your question.