We recommend replacing your insoles when you begin to notice a decrease in comfort or support. Several factors affect the wear of the product, such as activity, usage and foot structure, but under normal casual wear, your PowerSteps should last 6 months or longer. You can expect the product life to be significantly shorter if you wear the same pair daily or wear during rigorous activity such as running. PowerStep insoles are designed using the highest quality cushioning foams and supportive materials possible, but even these high quality materials will break down over time with extended wear and tear.