The Chapa GTX is constructed of rich nubuck leather allowing for breathable wear The GORE-TEX® shell while totally waterproof is also permeable to allow water vapor to escape The MBT Dry & Cool mesh and foam sock lining probides both breathability and moisture management. Perforated EVA insole provides added cushioning while at the same time reducing odor due to its antibacterial treatment. Glass fiber and TPU shank adds firmness to sole construction while ensuring even weight distributation and a natural rolling movement of the foot. PU midsole with pivot is the balancing section underneath the metatarsus which requires an active rolling movement with every step. Activate a large number of muscles while wearing these shoes while walking or just standing. The Masai Sensor creates the pleasant feeling of walking on soft moss or a sandy beach. Instantly offers a natural instability to which the body automatically reacts increasing muscle activity. Durable rubber outsole constructed from 20 different compounds offer lightweight support with good traction on a variety of surfaces. Why MBT Shoes?Activate Neglected Muscles Improve Posture, Circulation & Gait Tone and Shape Your Body Reduce Stress on Knee and Hip Joints Can Help With Foot, Hip, Leg & Back Problems Can Help with Muscle, Ligament, Tendon and Joint Injuries Equally Distributes Pressure Over the Whole Foot Benefits of MBT ShoesWhen standing10 degree posture/gait improvement +28% Buttock Muscle activity +37% rear thigh muscle activity +38% Lower limbs activity When walking10 degree posture/gait improvement +9% Buttock Muscle activity +19% rear thigh muscle activity +18% Lower limbs activity Increased abdominal activity -19% stress on hip and knee joints , Masai Barefoot Technology, is the brainchild of Swiss engineer Karl Müller. While visiting Korea Müller discovered that walking on paddy fields barefoot eliminated his back pain. Upon returning to Switzerland, Müller started to develop a shoe that would duplicate the feeling of walking over those paddy fields, sand or any other soft natural terrain. It took several years but in 1996 MBT shoes were ready to be released to the world. Since then, are now sold in over twenty countries and sell approximately 1,000,000 pairs a year.