These Feetures socks are constructed with targeted compression and anatomical design that conforms to the left and right structure of the foot, providing a custom fit and reducing the risk of blisters. These Feetures socks offer a thin cushion option without bulk for added impact protection. These socks have an invisible tab that sits just below the ankle for maximum versatility. These athletic socks are made with moisture wicking fibers to keep feet cool and dry; without irritating toe seam. Feetures LIFETIME WARRANTY: Our family business prides itself on products that are built to last, which is why we gladly provide a lifetime warranty on all of our socks; if you are dissatisfied, return them for a replacement.