I'm a healthcare professional and I wear Z-CoiL shoes in my office every day. I own seveal pair. They have been great for my back and knees. Your sophomoric comments about z-coil reflect a lack of awareness. Z-CoiL (headquartered in Albuquerque, NM) has been selling this footwear for over 12 years. There are about 125 stores. Most are west of the Mississippi.