This shoe is touted as a more cushioned adrenaline, and includes the Guiderail system to keep your feet and knees in line, thus helping with pronation. Although the cushioning of the shoe was GREAT (think: clouds), the support left something to be desired. I have worn these on runs and at work (I coach/teach, on my feet a lot), and have never seen or felt the benefits of the support they say the shoe has.