Sustainable Sports Sock: High Performance Feetures socks are produced with yarn made from recycled plastic and feature power bands of Lycra that hug the arch of your foot for maximum support, eliminating movement to reduce the risk of blisters Max Cushion: These Feetures socks for women and men have high-density cushioning to provide extra protection in high-impact areas Running Socks with Heel Tab: These socks have a No-Show Tab that sits just below the ankle for maximum versatility Breathable Socks for Men & Women: These sports socks are made with moisture-wicking fibers to keep feet cool and dry; plus no irritating toe seam Feetures Lifetime Guarantee: Our family-owned company takes pride in products that are built to last, which is why we are happy to provide a Lifetime Guarantee on all our socks; if unsatisfied, return for a replacement