If you're searching for a relaxed yet on-trend outfit, choose a navy v-neck sweater and cargo pants. If you want to instantly spruce up your outfit with a pair of shoes, why not introduce black leather derby shoes to the equation? This look is our idea of perfection for when leaves turn yellow and red and autumn is at its best. As you step into your 30s, you want to start dressing like an adult man. If that's the case, combinations like this prove useful as a source of inspiration.