Asics Sock Sizes
Sock Size	US Men's Shoe Size	US Women's Shoe Size
S	N/A	6-7.5

Sock Geek Says:

This sock has been discontinued by Asics so sizes and quantities are limited.

Economical sock for runners seeking breathability and cushioning.  A specially constructed mesh ventilation panel facilitates cool and dry feet, even as superior cushioning promotes impact resistance.

Asics 2100 Series Sock Specs

Sock Fibers:

90% - Polyester
6% - Nylon
3% - Lycra
1% - Elastic