Why not pair a shawl cardigan with a grey crew-neck t-shirt? These two items are super comfortable and look great combined together. To give your ensemble a more sophisticated touch, why not add a pair of tan suede loafers to this outfit? This ensemble is a great choice come warmer weather. As a 30-something Millennial guy, you want to start dressing like a grown-up. That's when combos like this are a foolproof option.