Protection level 3 extreme cold wool/Thorlon climbing and mountainerring over-calf socks for men and women by Thorlo. These socks are designed for use in sub-zero climates on challenging, rugged terrain. It provides the most protection available, beyond what any other climbing sock can provide today.

1) Full padding around the ankle to provide protection from boot pressure.
2) Ventilation panel to improve fit and wicking.
3) Heavyweight padding in the ball and heel protects foot from shear, impact forces and helps to prevent blisters.
4) Wool THOR•LON lace pad protects the top of foot and leg against boot lace pressure.
5) Spandex and padding in the arch for added comfort and better fit.
6) Full padding around the toe is 100% worsted wool to provide maximum protection and warmth.
Fiber Contents: 60% Worsted wool, 26% THOR•LON® Acrylic, 11% Stretch nylon, 3% Spandex.

Size 11 fits men's shoe size 5.5 - 8.5, women's shoe size 6.5 - 10
Size 13 fits men's shoe size 9 - 12.5, women's shoe size 10.5 - 13
Size 15 fits men's shoe size 13 - 15

Six Pairs Per Package.