For something more on the off-duty end, try this combo of a black print crew-neck t-shirt and black sweatpants. If not sure as to what to wear when it comes to footwear, complement this outfit with a pair of light blue leather high top sneakers. Keep this look in your front hall wardrobe when spring sets it, and we guarantee you'll save time planning what to wear on more than one occasion. As you can see, as a guy in his thirties, you have a wide range of styling options.