FF BLAST MAX cushioning: One of our most energetic midsole foams that's complemented with cloud-like softness and a responsive energy return in each step. PureGEL technology: Softer, updated version of our GEL technology that maintains all the acclaimed properties that have made GEL technology famous.  Approximately 65% softer vs standard GEL technology. Engineered mesh upper: A lightweight, breathable mesh material that reduces the need for additional overlays. FLUIDRIDE outsole: The outsole material is blended with EVA and rubber to help provide comfort and traction without sacrificing durability. Reflective details: Visibility for enhanced nightime and early-morning reflective brightness.