Zappos.com is proud to offer the MBT - Tabia (Tan) - Footwear: MBTandamp;#174; is the first physiological footwear that has a positive effect on the whole body. ; The MBT Tabia combines cutting-edge technology with a sophisticated slide silhouette to create a casual-yet-functional sandal. ; Full-grain leather upper with an adjustable hook-and-loop strap for a custom fit. ; Exceptionally soft moisture-conducting microfiber sock lining and split leather insole provide breathable wear. ; TPU and glass fiber shank adds firmness to sole construction and also ensures a natural rolling movement of the foot for even weight distribution. ; PU midsole with pivot is the balancing section underneath the metatarsus which requires an active rolling movement with every step. ; This activates a large number of stabilizing muscles throughout the whole body when walking or standing. ; Masai Sensor (Masai Barefoot Technologyandamp;#174;) creates a pleasant feeling of walking on a sandy beach or soft moss. ; Instantly offers a natural instability to which the body automatically reacts increasing muscle activity. ; Secure rubber outsole offers lightweight support and durability. ; Weight : 12 oz ; Product measurements were taken using size 39 (US Womens 8.5). Please note that measurements may vary by size.