FitFlop midsoles incorporate patent-pending micro-wobbleboard TM technology, to give you a workout while you walk .

Developed by Darren James and Dr David Cook at LSBU, the FitFlop's unique safely-tapered midsole places varying densities of EVA under your feet each time you step, to challenge the support and balance muscles of the foot and leg.

Every step you take in your FitFlops helps tone and trim your legs: Studies at Salford University by Dr. Philip Graham-Smith and Richard Jones have shown that the FitFlop midsole extends the amount of time that the slow twitch* muscles are engaged during each step (by approximately 10-12%). So just by wearing a pair of FitFlops you'll get more exercise while doing just exactly what you're normally doing. (*slow twitch muscles produce energy by converting fats into energy aerobically)

Walking in FitFlops is like walking barefoot, but a little bit better. According to a study done at the University of Salford in Manchester, UK, the FitFlop wearer's gait is very similar to that of a barefoot walker, but the added cushion provided by the EVA midsole helps reduce joint strain and absorb shock. In fact, several FitFlop wearers have already reported relief from back pain after a few days of wearing them.