Brooks Sock Sizes
Sock Size	US Men's Shoe Size	US Women's Shoe Size
S	N/A	4-6.5
M	6-8.5	7-9.5
L	9-11.5	10-12.5
XL	12-14.5	N/A

Sock Geek Says:

Key features include:

Endurall fabric effectively manages moisture while also keeping your feet comfortable with a smooth soft feel.

Mesh top reduces bulk and allows better air circulation, keeping your feet cool and comfortable.

Achillies tab helps protect against blisters in this friction prone area.

Technologically advanced performance fibers in impact areas to reduce irritations.

"Y" heel gore creates a deeper heel pocket, providing a better fit.

A flat toe seam all but eliminates the chance of abrasions caused by friction between harsh seams and toes.

Brooks Infiniti Sock Specs

Sock Fibers:

96% - Dri-Stitch Nylon
4% - Lycra Spandex