PREMIUM NON-ITCH MERINO WOOL: Our innovative wool blend features next generation yarns to provide the benefits of wool without feeling itchy, Made of 53% Merino Wool/36% Polypropelene/7% Nylon/4% Spandex. The running socks are unisex, designed for both men and women. See the size chart below or in the image to the left for sizing. PERFECT WET WEATHER RUNNING SOCKS: The wool in the Pure Athlete Running Sock has advanced hydrophobic properties that help to repel moisture. This means that if the weather becomes inclement or you step in a puddle, the low-show wool running socks will still feel great. Use for everything from trail running, marathons, or any sports. CUSHIONED ANTI-BLISTER TECHNOLOGY, MOISTURE WICKING: A cushioned heel and toe prevents blisters. A seamless toe prevents irritation. The moisture wicking properties wick away perspiration, keeping the merino wool running socks light and dry. Anti-odor technology prevents the buildup of stink. USE IN SUMMER AND WINTER: Discover why wool is the best material for running socks. No matter the time of the year, use the No-Show Pure Athlete Wool Running Socks for superior performance. The thermal regulating properties of wool keep your feet at the perfect temperature ? whether using as a cold weather sock or summer running sock. BUY FROM A TRUSTED AMERICAN COMPANY: At Pure Athlete, we are experts in socks. We are manufacturers of many of the bestselling running, hiking, and ski socks. Don?? take our word for it, read our customer reviews and try our running socks. We know you will love them or your money back. We back all our products by a 100% satisfaction money back guarantee.