Air-Sole - Technology to support a comfortable grip. It is used compressed air to absorb the shock on impact. Size varies among different models of sneakers React - It is a completely new foam, which is composed of a single piece of material. Thanks to the modern processing method, the design of the midsole is designed so that at specific places, which are most loaded during running, the shoe can be more attenuated. Conversely, in other places where much damping is not needed, the shoe is lightweight. You may notice the deeper parts that show more cushioned surfaces, even the shallower ones that create more strength.