A More Feminine Mary Jane Look For MBT In Soft Nubuck Leather. Suitable For The Office! MBT (Masai Barefoot Technology) Has a Positive Effect on Your Whole Body. The Combination of the Active PU Midsole and Masai Sensor in the Heel Requires an Active rolling Movement With Every Step - Activating Your Body's Stabilizing Muscles thus Strengthening, Shaping and Toning Them.