As soon as you try on a pair, you know that Feetures Elite socks are special. Thanks to the technically advanced Sock-Lock support system, your foot and sock become one. The sock fits so well, its almost as if its not even there. No show design. Cushioned tab protects your Achilles tendon and also helps keep the sock in place. Anatomical right and left foot design enhances fit, delivering maximum comfort and protection by helping to eliminate blisters. High density cushioning provides extra protection in high impact areas. The Perfect Toe gives you a no irritation toe seam. iWick fibers wick moisture to keep feet dry and odor-free. The Power Arch (Patent Pending) is anatomically constructed to provide targeted support where its needed most. Thin flat knit construction takes up minimal room in the shoe. Y-heel construction provides an optimal fit and prevents socks from sliding into the shoe. Size indicator on each sock for easier identification and matching.