I have one flat foot and one low arch foot and this superfeet blue orthotic insole is perfect for me. I had to start slow with about an hour a day of use and build up as I got odd little pains in my flat foot in the beginning, but they have now gone away one week later. My physical therapist said to use these for walking or biking rather than the low volume black ones which I also have. I purchased these after much research because I was having bad knee pain (from too much pronation) and even hip pain. Incorrect alignment can cause so many other problems that you would never even think it would. So these are my main every day orthotic, and I still use the black ones to fit in tighter shoes that I won’t be wearing as much.
-skiergirl