Smartwool PhD Endurance Pro Print

OUR TAKE Whether we were working up a sweat in the summer heat of Utah or plunging through rivers of fresh snowmelt in Washington, the Endurance Pros kept our feet in the comfort zone thanks to a 57 percent merino content. But unlike other trail running socks we’ve worn with that amount of wool, these didn’t develop holes in their first season. The secret? Dense, low-bulk cushioning over the toenails and along the sides of the toes. A high percentage of nylon (38 percent) enhances longevity even further; the Endurance Pros still look new after 200 miles of testing.

TRAIL CRED “I was impressed that the fabric dried in less than two hours
after multiple river crossings along the 22-mile Spectacle Lake Trail with temps in the low 20s,” our Washington tester reports.

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