I've tried different types of custom orthotics over the years and none of them seemed to help my flat feet. I've since purchased ALINE for permanent use in my cycling shoes. The results have been phenomenal. You can actually feel the power difference, amazing. Not only was I faster, but I felt fresh throughout the ride and less fatigue afterwards. I can't say enough about this product, I've been telling all my friends, athletes and non athletes alike. Keep up the good work!