For something on the classic and casual side, try teaming a black blazer with a black and white horizontal striped crew-neck sweater. For a more laid-back take, why not introduce tan suede espadrilles to the equation? If you're wondering how you should dress as a 30-something Millennial guy, this ensemble is a good source of inspiration.
Black and White Horizontal Striped Crew-neck Sweater with Black Blazer Outfits For Men In Their 30s
For an ensemble that's worthy of a modern style-conscious gentleman and effortlessly smart, dress in a black blazer and a black and white horizontal striped crew-neck sweater. For something more on the daring side to complement this look, complete your outfit with a pair of navy leather low top sneakers. This getup illustrates that well into your 30s you have a vast array of style options.