Incredible Comfort And Support The Nike Dry Lightweight Crew Training Socks Feature Supportive Arch Compression And Sweat-Wicking Fabric To Help Keep Your Feet Dry And Comfortable. Benefits Dri-Fit Technology Helps Keep You Dry And Comfortable Mesh Panel At The Top Of Foot Enhances Breathability Left/Right-Specific For Enhanced Fit Arch Support For A Snug, Secure Fit Reinforced Heel And Toe For Durability Product Details Fabric: Dri-Fit 78% Polyester/18% Nylon/4% Elastane Machine Wash Imported