Our NEW Compression Crew Sock allows you to focus on the game without worry of fatigue. Sold in pairs. High muscle support Design based on in-depth scientific research into human biomechanics. Provides muscle support and enhanced circulation to help to improve performance and reduce the fatigue of muscles and joints during sport. Small = Youth 1-6, Women's 4-7 Medium = Women's 6.5-10, Men's 6-9 Large = Women's 10-13, Men's 9-12 X-Large = Men's 12-15 96% Nylon, 4% Spandex Zoned padding and ventilation for the ultimate in comfort and breathability