SmartWool Men Sock Sizes
Sock Size	US Men's Shoe Size	US Women's Shoe Size
M	6-8.5	N/A
L	9-11.5	N/A
XL	12-14.5	N/A

Sock Geek Says:

Built on Smartwool's patented 4-Degree Fit System for an all day performance fit.  WOW Technology™ in High Density Impact Zones to reduce shock & abrasion.  Smartwool inside for moisture, temperature and odor control.  Durayarn reinforcement for added durability.  Padded achillies tab for comfort and protection. Strategic mesh zones for maximum ventilation.  All the great performance benefits of wool including it's a renewable resource!

NOTE:  Smartwool is back-ordered in the large Black/Silver so it maybe a while until they are available again.  Sorry!

SmartWool Ultra Light Micro Sock Specs

Sock Fibers: