Sugoi RS Crew Socks The Sugoi RS Crew Sock is a lightweight, moisture wicking performance sock that's made to keep your feet more comfortable for longer periods of time. Constructed of a nylon/spandex blend with structured arch support, the RS Crew Sock are also left and right foot specific for optimal ergonomics and comfort. The toe and heel have been reinforced for durability and longevity, so these socks will truly be more comfortable and last longer. Great fitting cycling socks Polypropalene yarn is used for durability Fantastic wicking characteristics to keep you dry and cool Men's Shoe Size Chart Size Small Medium Large Mens 5. 5 - 7. 5 8 - 10. 5 11 - 13 Womens 5. 5 - 7 7. 5 - 9 9. 5 - 10. 5 | Sugoi | RS Crew Cycling Socks | Black | Small Men's | Size Small