The upper of MBT Sport is PU-coated material and synthetic materials are highly durable and resistant.Single-layer mesh of MBT Sport is breathable and open woven breathable frabic.A movement between walking and jogging with an increased frequency of steps.If you wear the MBT Sport,when slow running one should maintain the upright posture and natural rolling action.The rubber outsoles of MBT Sport are made as a perfect compromise between grip and durability.Masai Barefoot Technology or MBT is not just a shoe in the ordinary sense-it is a revolutionary fitness aid from Swiss Masai.This product will not only change the way you use your muscles,but will improve the use of your joints and spine.The uniquely designed sole,combined with correct training,achieves a more active and healthy posture and walk.Masai Sensor 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.The most important point of PU midsole of MBT Sport is the balancing area underneath the metatarsus which requires an active rolling movement with every step.