Ultimate stability and cushioning for the severe overpronator. A very supportive upper combines many technical properties. Comfortable sockliner for fresh breathability, HRC strobel board increases the cushionig and step in comfort. Arch lock that provides a snug midfoot fit. Lightweight, breathable mesh upper. ProGrid in the heel, 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. Saucony's controlled stability zone provides maximum stability for overpronation while still maintaining optimal flexibility. With a blown rubber outsole and XT900 in the outsole a carbon rubber material that offers exceptional traction properties without sacrificing durability.