These Feetures socks are designed with targeted compression and anatomical design that conforms to the left and right foot structure providing a custom fit and reduced risk of blisters. Our thinnest cushion option provides a lighter, cooler feel and takes up minimal space inside the shoe. The 2" cuff provides the perfect amount of ankle protection against rocks, dirt and mud. These athletic socks are made with iWick fibers that wick moisture to keep feet cool and dry. Mesh construction of these Feetures socks provides ventilation for breathability. These running socks with seamless toes feature a perfect toe. Our family business takes pride in products that are built to last, which is why we are happy to provide a lifetime warranty on all of our socks. If you are not satisfied, return for a replacement.