Advanced stability for even the most severe overpronator in one lightweight package. Breathable mesh upper with no-sew overlays for flexibility and reduced hot spots. Lightweight stretch Arch-Lock material in the arch area creates a snug, supportive fit. Support Frame technology locks down the heel throughout the gait cycle. HydraMax Collar Lining is made up of performance apparel fabric for next-to-skin comfort and moisture wicking. Dual-density SSL EVA midsole cushioning for rebound and durability, while maintaining a light weight. Full-length PowerGrid with GRID technology to center the foot, absorb shock, and distribute pressure for a smooth and responsive ride. iBR+ rubber in the outsole provides more cushioning and a lighter weight than standard blown rubber. XT-900 carbon rubber heel for traction and long-lasting wear. Wt. 11.2 oz.