I recently started a job that requires me to be on my feet for 8 -10 hours a day on a concrete floor. At 49 my feet were killing me especially the balls of my feet.I tried everything I could buy at stores but could not find anything that would help much, untill I tried these Spenco's.Wow, what a difference. These things are a godsend. They are well built, they stay in my Red Wing boots without moving and you can tell they will last a long time. I no longer have the ball of foot pain that I had, See full review