UA’s Record Sensor™ technology tracks, analyzes and stores virtually every running metric so you know how to improve Padded ankle collar with updated construction for added comfort and easy entry Compression mesh Energy Web in the midsole creates responsive energy return HOVR™ technology provides ‘zero gravity feel’ to maintain energy return that helps eliminate impact step after step Breathable SpeedForm 2.0 padded sockliner creates a comfortable fit and adds protection Compression mesh Energy Web contains and molds UA HOVR™ foam to give back more energy External heel counter provides more stability and support at the heel 3D midfoot panel designed with laser perforations for added ventilation