The PRS, Push Regulation System, arises from the observation that, while for blades the market has activated to create a wide range (variation of the polymer, variation of hardness, of shape; research of different materials such as carbon and fiberglass) for the shoe remained the defect that, by inserting the blade in the special pocket just under the sole of the foot, there was a considerable dispersion of energy. Even a polymer shovel can give greater yield if the reaction of the shovel is transmitted exactly on the heel of the foot.
THE SALE REFERS TO THE PAIR OF SHOES INCLUDING THE ASSEMBLY KIT!