This combo of a white shawl cardigan and navy jeans is on the casual side yet it's also dapper and razor-sharp. Dark brown leather casual boots integrate seamlessly within plenty of combos. A practical example of transeasonal style, this ensemble is ideal when spring comes. As you're transitioning from your 20s to your 30s, you want to start dressing like a grown-up. That's when inspiration like this comes in very useful.