*** NEW *** BoostTM Midsole - Energy returning properties keep every step charged with an endless supply of light, fast energy. Coolever Mesh - Clover-shaped mesh within the upper for heat and sweat management and increased performance. Tirrenina Suede Overlays - Environmentally responsible and solvent free, decreasing the overall weight of the shoe. Moulded Responsive EVA Sockliner - For anatomical fit and great step-in comfort. EXTENDED TORSIONÂ® SYSTEM - Provides great forefoot energy return and promotes natural torsion in the midfoot.