FABRICS: 86% combed cotton, 10% polyester, 4% polyurethane. Made In Korea BREATHABLE MESH FUNCTION: Cotton is one of the most breathable fabrics around, and it is a natural fiber that absorbs moisture. If you’ve been having trouble with synthetic yarns like nylon/polyester socks, We strongly suggest that you try high quality cotton socks! ALL SEASONS PERFORMANCE SOCKS: These socks are suitable for all four seasons, as the socks are double layered with thick cushions. They match all types of low profile shoes, loafers, athletic shoes to perform walking, running, climbing, golf, tennis and more. COMFORTABLE ARCH SOCKS: Stability Fit built in for enhanced arch support. Cooltex fabrics located on upper and back of our socks serve to absorb sweat and dry quickly. Our socks not only prevents against heat irritation but also lets your feet breathe. ONE SIZE FITS & CARE: US Men’s Shoe Size 6-11 (Sock size 9-12). Machine washing in warm water acceptable, and tumble dry low. Do not iron.