For an outfit that's extremely easy but can be worn in many different ways, go for a black short sleeve shirt and a white crew-neck t-shirt. Switch up this ensemble with a more refined kind of footwear, like these dark brown suede loafers. If you're wondering what you should wear as a 30-something gent, this getup gives a fair idea.
Go for a black short sleeve shirt and a white crew-neck t-shirt for an everyday ensemble that's full of charm and personality. Complement this ensemble with black leather derby shoes to make the ensemble a bit classier. As a 30-something Millennial guy, you want to start dressing like an adult man. If that's the case, looks like this are a goofproof option.