For a look that's super straightforward but can be worn in many different ways, team a multi colored crew-neck sweater with a blue long sleeve shirt. On the shoe front, this outfit is complemented wonderfully with brown leather casual boots. When leaves turn yellow and red and autumn is in the air, you'll love this getup as your favorite for summer-to-fall weather. This combo demonstrates that well into your 30s you have a vast array of dressing options.