Style#: FB1309-500 Dual-density midsole with ZoomX foam stacked on top of Cushlon 3.0 foam for a comfortable ride Redesigned waffle-inspired outsole with break points for a smooth, flexible stride Plush tongue and lining for a comfortably snug feel New stacked foam midsole with premium ZoomX on top of Cushlon 3.0 foam to amplify cushioned comfort. Maximum cushioning provides a comfortable ride for everyday runs. Experience enhanced comfort in this latest version with a dual-density midsole made with a combination of ZoomX underfoot and Cushlon 3.0 foam throughout. Plus, a new engineered mesh upper offers more breathability.