The adidas adiZero Hagio racing flat features an air mesh upper that provides maximum ventilation. Asymmetrical design. Full forefoot adiPRENE® aids forefoot propulsion. TORSION® SYSTEM adds midfoot integrity. adiWEAR® outsole gives best durability in high-wear areas. Forefoot lugs deliver traction on road surfaces. Blown rubber offers lightweight grip and cushion. Flex grooves for optimum forefoot flexibility. Removable insole. Wt. 6.0 oz.