SmartWool PHD Ultra Light 3/4 Crew

PROPS: Like all of SmartWool's socks, the PhDs keep feet warm and dry and take a while to wear out. BEHIND THE SCENES: Yes, the merino wool is from New Zealand. But 90 percent of the socks made by SmartWool—the outdoor industry's largest sock maker—are knit in North Carolina and Tennessee. $17;

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