MATERIAL: 83% polyester, 12% spandex, 5% elastic. SIZE CHART: Three sizes available: S/M fits men shoe size 5-9, women shoe size 6-10. L/XL fits men shoe size 9-11, women shoe size 10-12. XXL fits men shoe size 11-14, women shoe size 12-15. COLORFUL RUNNING SOCKS: We provide five vigorous colors with fashion styles for your selection. Our ankle running socks are suitable for all seasons and match well to all your favorite running shoes, sneakers and more! COMFORTABLE ATHLETIC SPORT SOCKS: Elastic cuff prevents our running socks from sliding down into your shoes. Cushioned toe and heel offer amazing shock absorption and comfort to your feet, guarding against blisters and friction. Arch supports ensure your arch stable and secure, preventing Plantar Fasciitis and swellings and relieving foot fatigue. L and R specific distinction provides much more comfort with professional adjustment. BREATHABLE & DURABLE RUNNING SOCKS: Breathable mesh knit creates maximum airflow to keep your feet dry & cool. And moisture-wicking properties promptly perspire sweat away from your feet, effectively resisting odors and preventing blisters. High quality polyester provides our athletic running socks with high strength and superb elasticity. OCCASIONS: Insox makes sports and health easier. Our athletic performance running socks are widely used in daily life, running, jogging, gymnasium, hiking, soccer, basketball, marathon, hockey, tennis, golf, cycling and etc. Versatile and fashionable, our performance running socks are not only indispensable partners for runners, trainers, athletes and so on but also ideal gifts for those who like sports, father/ mother, son/ daughter, beloved ones and friends.