As all feet and people are different, there is not one specific insole designed for flat feet. Our proprietary Superfeet shape adapts the flat surface inside your footwear to the contours of your foot, making your shoes (and you!) remarkably comfortable. To pick an insole, start with your activity and footwear (i.e. if you are hiking, start by looking at Superfeet insoles for hiking...if you are running, start by looking at Superfeet insoles for running, etc.)
For general, non sport-specific use, you may find that our insoles with the most flexible, accommodating shape (like FLEX, BLACK or COPPER) may feel best for you if you have been diagnosed with or feel like you have flat feet.