The ProGrid Guide has become Saucony's fastest selling stability shoe around the world. This is because it provides great fit and feel, but also because it supports the foot without the running feeling it! The support in the shoe is strong but subtle, sitting under the arch so should the runner begin to Overpronate, the Guide will "guide" the foot back into a neutral position so that when the runner toes-off, this occurs from a biomechanically efficient position thereby dramatically reducing the chances of injury.