MBT - M.Walk (Silver Mesh/Synthetic Leather) - Women's: MBT(R) states this shoe runs 1/2 size small so you may want to order larger. ; For instance, if you wear a size 38 1/3 (US 8), you may want to choose a size 39 (US 8.5). MBT(R) is the first physiological footwear that has a positive effect on the whole body. The 'M.Walk' sneaker features combo synthetic leather and poly mesh upper for both breathable and durable wear. Padded tongue and collar offers added comfort for immediate wear. Mesh lining helps wick away moisture for a healthy foot environment. Perforated, EVA insole provides added cushioning with antibacterial treatment to reduce odor. 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 Technology(R)) 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. Durable rubber outsole offers lightweight support with good traction.