Under Armour UA Rebel Storm Women's Running Shoes Slimmer Athletic Cut - Delivers better mobility by eliminating the bulk of extra fabric. DWR Technology - Repels water without sacrificing breathability or adding weight. UA Spine Chassis Technology - Creates an light, flexible feel without sacrificing support. Micro G foam - Encapsulated within the chassis delivers unrivaled rebound and energy return. Ripstop Upper With An Underlying MPZ - Structure for protection and lightweight support.