Ironman Sock Sizes
Sock Size	US Men's Shoe Size	US Women's Shoe Size
M	6.5-8.5	7.5-9.5
L	9-11.5	10-12.5
XL	12-14	N/A

Sock Geek Says:

Part of the Ironman Pro Series.  Moderate cushioned-sole running sock in a mid-calf crew silhouette. Patented moisture control system designed to keep your feet, cool, dry, and blister free. Breathable mesh instep. Foot hugging fit with Sure Fit leg to decrease slipping. Virtually seam free toe enclosure.  Features X₂O Acrylic fibers that fight bacteria, fungus, and mold to maintain a healthy environment in the sock.  Ironman Triathlon logo on the arch.

Ironman Thunder Pro Sock Specs

Sock Fibers:

42% - Dri-Release
31% - Stretch Nylon
26% - X₂O Acrylic
1% - Spandex