Nike Sock Sizes
Sock Size	US Men's Shoe Size	US Women's Shoe Size
M	6-8	6-10
L	8.5-12	10+

Sock Geek Says:

Non-cushion version of Nike's popular Structure run sock features Nike's Sensory Enhancement Technology (S.E.T.) which heightens awareness of foot and ankle position to help control pronation and promote a neutral, stable landing and toe-off.  High-Strength Arch Support helps alleviate foot fatigue during long runs while Anti-Blister Construction consisting of two layers of low-friction yarn helps reduce heat build up.  Left/Right specific fit for maximum comfort and performance.

Nike Structure Running Sock Specs

Sock Fibers:

68% - Nylon
29% - Polyester
3% - Spandex