For a cool and relaxed outfit, consider wearing a cardigan and brown chinos — these two items go really cool together. Finishing off with a pair of charcoal loafers is a guaranteed way to give a sense of polish to this getup. As you can see here, this outfit is a really smart idea, especially for transitional weather, when the temperature is dropping. As a man in his 30s, you want to start dressing like an adult man. If that's the case, ensembles like this come in useful.