Running in bad socks sucks. If clocking up more than 65 marathons and 20 ultras, and plodding most of the way across Europe has taught me one thing, it is this: A runner is only as happy as his or her feet. You can drop hundreds of bucks on the best running shoes, but if you stick your foot into an old gym sock, you still risk ending up with blisters.
Running socks—along with running underwear—are probably as mission-critical to your comfort as anything else you work out in. It’s why regular ultra…
