Industry leading pronation control, a high end responsive cushioned shoe. Arch lock that provides a snug midfoot fit, with premium sockliner for ventilation superiority. Lightweight, breathable mesh for a feel fresher for longer run. HRC strobel board increases the cushionig and step in comfort. Full length ProGrid, built closer to the foot, for greater cushioing and shock absorption. Response-tek platform, made from a blend of foams and synthetic rubbers, responds with every stride for a smoother heel to toe transition. dual density SSL EVA a blend that maximizes rebound and durability while minimizing weight. SRC impact zone provides shock attenuation and sets the foot up for a smooth transition. With a blown rubber outsole and XT900 in the outsole a carbon rubber material that offers exceptional traction properties without sacrificing durability.