Following in Mad Rock's tradition of being an innovator, we've incoproated all of our next gen features into one shoe. We've spent countless hours developing a new a material called the Power Flex Upper which allows for a tight, glove-like fit WITHOUT the pain that is inherent with other performance shoes. By infusing a two-way brushed polyester material with our new Science Friction 3.0 formula, you can get that performance-like fit with minimal breaking in. The Con series models are also the first climbing shoes to incoporate the use of a 3D molded polycarbonate midsole. The Concept 2.0 uses our AES-1 Midsole design to provide a stiff flex that never breaks down. The combination of our AES-1 midsole and 3D molded rubber concave sole creates a cup that you can use to grab at features like a hand. A hemp foot bed keeps odors under control while also minimizing stretch. As with all of our new 2011 models, the Concept 2.0 is manufactured with our new R2 rand system that increases heel and arch tension but allows for a more sensitive and comfortable fit.