Fit Flop

It's a flip flop with a gym built-in. Half sexy streamlining, half muscle-toning trainer, the FitFlop is the shoe to have this summer. Developed by expert biomechanists Dr. David Cook and Darren James at the Centre for Human Performance at LSBU in London, FitFlops load your leg muscles more so you get a workout while you walk. Whoa! FitFlops launched in the UK in May, and SOLD OUT IN A WEEK! Shape up, we predict these shoes will sell out quick—so ‘flop’ to it and pre-order yours right now.

Every step you take while wearing FitFlops helps tone and trim your thighs, calves and glutes via a uniquely built multi-density midsole. In fact, they’re engineered to absorb shock, lessen joint strain and recreate the gait of barefoot walking with a powerful new built-in micro-wobbleboard workout-enhancing effect. Available in black, red and blue (available in July), $45. Sizes 6-10.