The Vibram Fivefingers KSO Trek Trail Shoe offers a 4mm EVA midsole for plating protection and a lightly cleated 4mm Vibram performance rubber outsole for added grip on a variety of surfaces. A kangaroo leather upper and footbed promote an optimally breathable, comfortable platform that keep your feet dry and temperate. MINIMALIST RUNNING / BAREFOOT RUNNING The typical human foot is an anatomical masterpiece of evolution with 26 bones, 33 joints, 20 muscles, and hundreds of sensory receptors, tendons and ligaments. To keep our feet healthy, like the rest of our bodies, they need to be stimulated and exercised regularly. Many experts believe the shoes we wear not only cast the foot in a protective form, but can also weaken our foot and leg muscles, leaving them underdeveloped and more susceptible to injury. And while there are many occasions where traditional footwear is essential for protection, safety, and security, it is equally important to stimulate and exercise our feet in a more natural state on a regular basis. To stimulate the muscles in your feet and lower legs, which in turn can make stronger, healthier and improve your balance then the Vibram Fivefingers could help you achieve this. Use them for training, running and many other activities to see the benfits!