Nike Elite Lightweight Quarter Running Socks 3% elastane Dri-FIT fabric to wick away sweat and help keep you dry and comfortable. Reflective details for enhanced visibility. Left/right-specific for an enhanced fit. Y-stitch heel for a secure, snug fit that prevents sliding. Flat toe seams help reduce irritation and bunching. Reinforced heel and toe for durability in high-wear areas. Fabric: Dri-FIT 57% polyester/40% nylon/3% elastane