Gore Bike Wear Universal Windstopper Socks, Black (11.0-12.0) SHELL:100% Polyester/ WINDSTOPPERMEMBRANE/ 100% Polyester/ CUFF:88% Nylon/ 12% Elastane/ Imported High compatibility: these windproof cycling socks are worn like normal socks, ensuring easy and practical wear. Thermo stretch cuff Flat-lock seams Reflective transfer print to mark right and left