This casual pairing of a navy denim jacket and dark green cargo pants is a fail-safe option when you need to look cool in a flash. Feeling venturesome today? Switch things up by finishing off with a pair of white and black athletic shoes. On not-so-chilly afternoons, you can work this transitional look and look absolutely awesome. Sartorial inspiration like this will help you remain enviously fashionable way into your 40s.