Design: Zonal engineered mesh is equally breathable, but more durable than the previous version Smooth SPEEDROLL Technology for effortless speed, smooth turnover, and propulsive forward motion Re-engineered winged nylon plate provides reinforcement while maintaining flexibility throughout the forefoot Integrated tongue for a connected, secure fit In-Shoe Comfort: All-new Super Responsive Sockliner for serious step-in comfort PWRRUN PB foam offers an unparalleled combination of cushioning and energy return Additional Details: Weight: 7.2 oz (185g) Offset: 8mm (36/28mm