These premium-quality performance socks boast impressive credentials. The incredibly soft fabric blend features high-tech fibers that reduce heat and chafing as well as keep feet dry. Plus, they are reinforced for durability where you need it most and feature a comfortable, stay-put fit. Comfortable seamless toe NanoGLIDE® High Tech fiber minimizes friction for less heat and chafing Moisture managing, supersoft, eco-friendly TENCEL™ fibers Reinforced zones for durability Graduated non-binding top for best fit 33% TENCEL™, 31% nylon, 23% polyester, 8% NanoGLIDE®, 5% LYCRA® Spandex ImportedHigh Performance Tek Work Sock High Performance Tek Work Socks in Black SpandexPolyester, Size: Large by Ariat