Masai Barefoot Technology (MBT) trainers revolutionised women's lives with built-in technology that toned our butts and legs as we wore them. In a similar vein are the newly launched FitFlops (HK$390), which have been dubbed the summer alternative to MBTs. The brainchild of Bliss Spa founder Marcia Kilgore, the shoes sold out when they launched in the US and Britain earlier this year. They feature a patent-pending 'micro-wobble board technology' that, according to the company, destabilises the foot slightly to create tension in the muscles. Resultant benefits are said to include fat burning, improved posture, muscle strengthening and reduced joint strain. True or false, the only way you'll know is by trying them out. The style is available in three colours and sizes run up to a US 10, so men can try them too. Available at Rush stores including that at G/F, Wilson House, 19 Wyndham Street, Central, tel: 3102 0558.