Engineered mesh upper with water repellent processing. FF BLAST PLUS cushioning: Midsole foam that provides a blend of cloud like cushioning and a responsive ride that is lighter than FF BLAST. GUIDESOLE technology: The curved sole design of our GUIDESOLE technology helps reduce ankle flexion and absorb shock to help you run easier and longer. ASICSGRIP outsole rubber: ASICS proprietary outsole that provides advanced grip on a variety of terrain. EVA sockliner: Sockliner that provides cushioning performance and moisture management for a cooler, dryer environment.