Is the Fit Flop another weight-loss gimmick or does it really work? The Fit Flop claims to work your thighs and calf muscles with their patented shoe design of a multi-density sole that 'works' on your muscles midstep, thus toning your thighs, calves and glutes. They work by slightly destabilizing the foot, so that you're constantly fighting for balance while you're wearing them. They do this using a micro-wobbleboard that is incorporated into the sole of the shoe and makes them a slightly raised platform. Wearers have noted that the walking takes some getting used to as you have to focus on a more concentrated way of walking. The shoes are meant to be extremely comfortable as well with a soft cushioning and have been ergonomically designed to mimic a barefoot gait.