Seamless, breathable mesh upper with lightweight reinforcements for added support. Padded tongue and collar provide next-to-skin comfort. Dual-density DuoMax Support System stabilizes your stride, while SpEVA returns energy with every step. Rear- and forefoot GEL Cushioning Systems absorb and disperse shock at impact, creating a smoother running stride. Guidance Trusstic System and Impact Guidance System help guide your foot from heelstrike to toe-off for a smoother, more efficient gait. Solid rubber outsole for durable traction on any surface. Wt. 8.8 oz.