My employee was about to do surgery in two months. She decided not to do it anymore due to biel products. Make sure to buy the Smart Insole and couple Actipatches. With the combination pain for her was reduced over 80 percents. Can purchase at amazon here is the link https://www.amazon.com/gp/offer-listing/B01CZ5IKG8/ref=mw_dp_olp?ie=UTF8&condition=new https://www.amazon.com/gp/offer-listing/B071CFNH5T/ref=mw_dp_olp?ie=UTF8&condition=new