Ultimate support and cushioning for the neutral runner, supportive upper incorporates arch lock. The progrid also provides optimal ride, respon-tek platform made from a blend of foams and synthetic rubbers, responds with every stride for a smoother heel to toe transition. Arch lock provides a snug midfoot foot. The sockliner gives even further comfort and security. Made from lightweight breathable mesh for great ventilation. ProGrid in the heel. Dual density SSl EVA, advanced eva blend maximises rebound and durability and minimizes weight, while slowing the rate of pronation. Blown rubber outsole.