Good riding socks are a must. Sock Guy's socks feature superior softness and comfort and help eliminate blisters and hot spots. They also feature a double stitched heel & toe for added strength and durability. Made with 75% Ultra-wicking Micro Denier Acrylic, 15% Nylon, and 10% Spandex for exceptional comfort and strength. Size Chart SIZEUS MENSUS WOMENSEURSmall / Medium5 - 96 - 1037 - 42Large / Extra Large9 - 1310 - 1443 - 48 | Sock Guy | Biker Chick Cycling Socks Women's | Size Small/medium In Black | Nylon