A black crew-neck t-shirt and light blue ripped jeans are the perfect way to infuse muted dapperness into your daily casual wardrobe. For a more polished feel, complete your look with a pair of beige canvas low top sneakers. Clearly, it's easier to work through a summertime afternoon in a fresh getup like this. This getup illustrates that as a gentleman in his 40s, you have a vast array of sartorial options.