HASLRA Hiking Five Fingers Toe Socks 2 Pairs 90%Cotton 5%Polyurethane 3%Span 2%polyester [EXCELLENT STRETCH & SUPREME COMFORT] Spandex for better fit, Extra durable heel and toe for extended wear, Smooth toe seam [HIGH QUALITY COTTON & BREATHABLE] Superior moisture management, Odor Guard, anti-microbial treated to control foot odor and athlete's foot [SUPPORT] Arch support to help fight fatigue [#MSOT024] Excellent cushion [#HMSOT022] Light dual-cushion [EASY CARE] Machine washable with cool water. Best to air-dry. Socks dry pretty fast [SIZE] Medium - Men's Shoe (6-9), Women's Shoe (7-10), Large - Men's Shoe (9.5-11), Women's Shoe (10.5-12)