MATERIAL: 50% polyester, 20% cotton, 15% spandex, 10% elastic, 5% nylon. SIZE CHART: S/M fits men shoe size 5-8/ women shoe size 6-9; L/XL fits men shoe size 8-11/ women shoe size 9-12. HIGH PERFORMANE: Superb polyester make our socks more durable and elastic. High quality cotton wick sweat away from your feet and provide a soft feeling for your feet, reducing odor, blisters and injuries. Combined with spandex and elastic in cuff, our socks stay up well and would never slide down when you are enjoying running and other sports . MULTIPLE FUNCTIONS: Graduated compression promote blood circulation and oxygen flow, reducing muscle fatigue and weariness. Reinforced toe and heel and cushioned sole offer amazing shock absorption and comfort to your feet, guarding against blisters and friction. Breathable mesh creates maximum airflow to keep your feet dry & cool, and moisture-wicking properties promptly perspire sweat away from your feet and effectively resists odors. COMPLICATED COMPRESSION DESIGH: Since our running socks are designed with target compression, the cuffs would be a little tight but they have good resilience with optimal blend of spandex and elastic. Unique graduated compression technology built around target layers to support the toe, the arch, the heel and the Achilles tendon work perfectly together to relieve pain and discomfort related to Plantar Fasciitis, varicose veins and so on. Say goodbye to injuries and swellings. OCCASIONS: Insox makes sports and health easier. It is practically proved that our running compression socks provide a comfortable experience for athletes, and are beneficial to relive tiredness after exercise. Our socks are not only indispensable partners for those who like running, jogging, basketball, cycling, hiking, tennis, sports, gym and so on but also ideal gift choices for son/ daughter, mother/ father, beloved ones, friends, runners, trainer and etc.