Parásoles are designed to be durable with more utility than a typical pair of socks. We have been wear testing pairs for over 2 years, and have yet to wear them out. That said, it really depends on how you're using them, body weight, and total steps traveled. Because of these variables, we can't estimate exactly how long they will last for you. We recommend replacing them with new pairs every 6-8 months, to maintain the best cushioning and compression properties.