This pairing of a charcoal double breasted blazer and a denim shirt is the perfect balance between dressy and laid-back. Clueless about how to finish off? Introduce olive suede casual boots to the equation for a more casual finish. With the departure of snow comes a sense of spring renewal and the need for a summery ensemble just like this one. So as you can see this ensemble is something you can totally wear as a 30-year-old gent.