Your running sock might not win you the race, but it could lose you one if it doesn't perform. That's why we set out to see how much performance we could put into a running sock. Turns out, a lot. Like the pattern at the arch which triggers sensory receptors to prime your feet for the run. Plus Swiss Engineering to then keep the sock firmly in place. For performance standards that don't slip.
Small: Women's 5-6/Men's 7-8
Medium: Women's 8.5-9.5/Men's 8.5-9.5
Large: Women's 10-11/Men's 10-11
X-Large: Men's 11.5-12.5