Asics Gel Evolutionis a running shoe that provides superb motion control without being too heavy. It supplies great cushioning with Gel inserts at the heel and forefoot. Asics Gel Evolution includes an advanced 360 degree system that forms a pocket between the Trusstic System device and the midsole, permitting greater midsole flexing and more efficient foot movement. Pronation is the rotation of the foot bones so that weight is borne mainly on the inside of the foot. Asics Gel Evolution uses Duomax, a proprietary Asics system using two different density midsole materials to provide the foot with strong support and protection against overpronation.