For something more on the cool and laid-back end, try this pairing of a raincoat and a black and white crew-neck sweater. Does this outfit feel all-too-perfect? Introduce white low top sneakers to switch things up. So as you can see, this outfit is a really smart option, especially for awkward transition weather, when the mercury is getting lower. Wondering how to master casual outfits in your twenties? This pairing is an amazing example.