Since using this sock, I can only think of one time that I got a blister and that was my own fault for wearing gore-tex running shoes in 95 degree weather for 50 miles. They keep my feet dry, while trail running up here in the wet, muddy Northwest.
The downside is their life span being wool. I can usually only get 100-150 miles out of a pair before they start wearing thin. For their price they should last longer.
Nice snug fit, I bought the size small for men's 8.5 shoe size.
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