Consider pairing a waistcoat with grey vertical striped dress pants if you're aiming for a neat, fashionable outfit. Complement this outfit with a pair of beige tassel loafers to effortlessly step up the wow factor of this ensemble. And if you're looking for an amazing transition ensemble, this one is great. As a 30-something gent, you probably want to start dressing more maturely. If that's the case, combos like this are a life saver.