These have been my son's sock of choice for long-distance training runs for the past 6 years...beginning with high school cross country and now during his college/professional running.  With 100+ mile/week training runs, he goes through socks pretty quickly.  Not only do these Wrightsocks protect his feet from the normal "sweaty feet" blisters; they also continue to protect his feet when they're soaking wet from training in heavy rain and the occasional slogging through streams.  The outer layer of the Wrightsocks wear out first which is our signal to buy replacements (a bit better than the complete hole that is the wear-pattern of most socks).  This price with Amazon Prime saves me over 25% compared to the usual price I've had to pay at sports stores.  This really adds up for us with the number of socks that he goes through each year.  For competitive races, he does use special racing socks, but the Wrightsock is his favorite for daily training use.