Make a crew-neck sweater and sweatpants your outfit choice for both dapper and easy-to-wear getup. To add a dose of stylish effortlessness to this outfit, complement your outfit with a pair of black and white athletic shoes. So as you can see, this combo is a really great choice, especially for unpredictable fall weather, when the temperature is dropping. After all, when do you dress casually if not during your teens?