This pairing of an olive wool blazer and a beige long sleeve t-shirt is proof that a straightforward casual look doesn't have to be boring. Complete your outfit with black leather derby shoes to effortlessly turn up the style factor of this look. So as you can see, this look is a really smart choice, especially for unpredictable fall weather, when the temps are getting lower. Ensembles like this have a sophisticated air that suit men over 30 very well.