The "Sorbothane" is the typical product to own. It effectively replaces the original insole of my shoes. Why? In my case, for back problems, I have 4 vertebrae in poor condition, and I practice a sport, fencing, soliciting enormously my back (and lower back). The cushioning of this model is distributed exactly to areas used in fencing, heel and wide area before the toes. More from sciatica and back pain and other back pain in my case. A product to have and I highly recommend.