I have flat feet and found that medical inserts are essential for me. This shoe is one of the only work-shoes that allow me to use them comfortably. They definately support my feet, my balance, and my over pronation. To the point that I must replace them at a minimum of every six months or I begin feeling pain in my feet, ankles, knees, and back. The inserts last for years, so I know that the shoe works because when I make the change, I feel better almost the same day.