Fabulous, fun, and with just the right dose of"flash", the irresistible ELECTRA occupies the top spot as our bestselling sandal ever. Smothered in sequins for a bit of girly-whirl, and built on our leg and bottom muscle-toning Microwobbleboard midsole, it’s the flip flop with the gym built-in.FITFLOP. GET A WORKOUT WHILE YOU WALKFitFlop footwear is biomechanically engineered to help tone and tighten your leg muscles while you walk. Studies at the Centre for Human Performance at LSBU show that normal walking in FitFlop sandals can help: