FF BLAST PLUS cushioning: Midsole foam that provides a blend of cloud like cushioning and a responsive ride that is lighter than FF BLAST Technology. PureGEL technology: Softer, updated version of our GEL technology. Approximately 65% softer vs standard GEL technology. Engineered mesh upper: A lightweight, breathable mesh material helps reduce the need for additional overlays.  FLUIDRIDE outsole: Helps create smoother strides AMPLIFOAM PLUS cushioning: Midsole cushioning that provides a more soft and comfortable ride than standard AMPLIFOAM cushioning.