In recent years, functional (read: fugly) one-syllable shoes like Uggs and Crocs have been cropping up everywhere. Now everyone and their grandma is hoofing around in FitFlops. But can a specially-designed shoe really whip your rear into shape, no sweat required? FitFlop, a U.K.-based company, along with Skechers and Reebok, who also make "toning shoes," say yes.