PureGEL technology: Softer, updated version of our GEL technology. Approximately 65% softer vs standard GEL technology. Engineered mesh upper: A lightweight, breathable meshmaterial helps reduce the need for additionaloverlays. AMPLIFOAM PLUS cushioning: Midsole cushioning that provides a more soft and comfortable ride than standard AMPLIFOAM cushioning. Reflective details: Designed to help improve visibility OrthoLite X-30 sockliner: Sockliner that provides cushioning performance and moisture management for a cooler, dryer environment.