FitSok offers a lifetime warranty with every pair of socks. With our lifetime warranty on running socks, we are committed to giving you the best quality, best fit, and best performance that you deserve. In every corner of our business, whether it's customer service, concept, design, or our final product of running socks, we put everything into what we do because we have such a strong sense of faith in our product. If your socks do not fit well, develop holes, or are delivered with noticeable and significant flaws, we will replace them. To get your replacement, just snap a picture of the flaw or hole and submit it to our attentive customer service staff at TheTeam@FitSok.com. We’re here to get you up and running again.