You can certainly dress these shoes up with a formal fit ... There are very few situations where a Gucci bit loafer is not the right outfit-finishing move. Post tennis with track pants?

We've got the classic Birkenstock Boston clog—really, a no-brainer for the slip-on genre—and the G.H. Bass Weejun, ole reliable through the years. If you want something more casual, like a sneaker, we ...