Your brown t-shirt will seem more polished if you wear it with a tweed or linen coat. For a smart and preppy look, wear this outfit with a pair of chinos. This contrast is intriguing because you can adjust the footwear for even greater versatility. Put on a pair of minimalist sneakers for a more comfy look or a pair of loafers or brogues for a more upscale appearance. You can team your brown t-shirt with a pair of slim-fit or sewn shorts throughout the sweltering summer months.