Woven mesh upper: Breathable material helps keep your feet dry Asymmetric tongue wing: A tongue feature that provides a comfortable and secure feel around the midfoot while reducing tongue movement. Trampoline-inspired outsole pod: Helps to improve stability during the toe-off stage of your stride 3D GUIDANCE SYSTEM: Adaptive, on-demand stability system achieved through platform geometry and controlled deformation. Rearfoot PureGEL technology: Softer, updated version of our GEL technology. Approximately 65% softer vs standard GEL technology.