Wear a black zip neck sweater and white chinos for a comfy getup that's also pulled together nicely. As for shoes, introduce a pair of dark brown suede casual boots to your outfit. This combo shows that as a man in his thirties, you have a wide range of sartorial options.
Rock a black zip neck sweater with white chinos for standout menswear style. Introduce a pair of brown leather casual boots to the mix et voila, the look is complete. Sport this combination to achieve a more mature look as a 30-something Millennial guy.
If you don't like putting too much effort into your outfits, try pairing a black zip neck sweater with white chinos. Dial up the dressiness of your outfit a bit by finishing off with brown leather brogue boots. When it comes to dressing ideas for men in their thirties, this combination is perfect.