Design: SPEEDROLL Technology for effortless speed, smooth turnover, and propulsive forward motion Full carbon plate engineered for maximum propulsion and instant turnover In-Shoe Comfort: All-new Super Responsive Sockliner for serious step-in comfort Silky smooth heel liner and integrated tongue for a connected, comfortable fit PWRRUN HG / PWRRUN PB foams are fused together to deliver an unparalleled combination of cushioning and energy return Additional Details: Weight: 6.5 oz (185g) Offset: 8mm (39.5mm/31.5mm