The Nike Free are shoes specifically designed to ensure a natural movement of the foot in comparison to regular footwear. The Nike team has been observing biomechanics of sportsmen´s feet for over 8 years in order to design the ideal technology to complement the natural motion of the foot.
Suede: leather cut from the back, while the fibers remain on the surface, suede is less prone to damage than nubuck.
EVA: most commonly used as a midsole material, because it has very good shock-absorbing effect, it also excels among other materials in its crack resistance and elegant smooth surface.
Rubber: a material that is very easy to maintain and you will appreciate it especially in rainy weather.