Teaming a waistcoat and olive jeans is a guaranteed way to inject your wardrobe with some masculine sophistication. Want to break out of the mold? Then why not introduce black leather loafers to the equation? So if it's a boiling hot summer afternoon and you want to look seriously stylish without putting in too much work, this ensemble will do the job in no time. In this, any 30-something gentleman is guaranteed to put most of his peers to shame.