Athletic ankle socks made of 80% Cotton, 18% Polyamide/Spandex, 2% Elastane. Machine washable - warm gentle cycle. Sold in pairs only. Available in 2 sizes: Medium (Woman's 9-11), Large (Men's 10-13). Note: Two sizes may be combined to meet quantity breaks. Not available for Less than Minimum (LTM) orders. *24-hour rush service only applies to catalog quantities up to 1,000 pairs.