Almost three years ago I had plantar fasciitis in both feet and had a hard time walking first thing in the morning or after long periods of sitting. I purchased Happy Feet and the arch support sleeve. I was game for anything that might work. Since it was so long ago, I could not say how long I wore the sleeves, but I no it couldn’t have been much longer than a couple of months. I still wear my Happy Feet every day no matter the pair of shoes I wear. Now I’m as happy as my feet.