Ironman Sock Sizes
Sock Size	US Men's Shoe Size	US Women's Shoe Size
S	N/A	4-7
M	6.5-8.5	7.5-10
L	9-12	10.5+
XL	12.5+	N/A

Sock Geek Says:

A moderate cushioned-sole running sock in a low-cut silhouette. Foot hugging fit. Virtually seamless toe enclosure. Ironman Triathlon logo on the arch.

Note: This sock was known for many years as the Ultimax Running Low Cut

Ironman Running Pro Sock Specs

Sock Fibers:

50% - Olefin
30% - Stretch Nylon
15% - X₂O® Acrylic
5% - Lycra Spandex