Height of upper

The sock completely covers the calf for runners who prefer shorts, even in winter.

Below the knee

for really cold temperatures, wear warm tights over your socks

Warmth

the wool keeps your feet and legs warm in sub-zero temperatures.

Reduced chafing

knitted with a special yarn to reduce the effects of rubbing.

Foot support

Elastic strip at the midfoot arch to hold the sock in place on the foot.