Leave it to the Swiss to engineer fat-fighting footwear. MBT's (short for Masai Barefoot Technology) athletic trainers, and sandals are designed to tone muscles, better your balance, improve posture, help varicose veins and-have been known to swiftly sack cellulite. Like an invisible personal trainer, they subtly strengthen and engage, increasing precious blood flow to 'problem areas' every moment you have them on.