“My No. 1 recommendation for long underwear is merino wool,” says Sarah Savala, a gear expert and customer-care supervisor at the Seattle-based outdoor retailer Evo. “It wicks moisture away ...

When I bought my first pair of Merino wool underwear—a pair of Ibex briefs—from a Vermont gear shop in 2017, it was a game changer. I dubbed them my “adventure undies,” since they were the ...

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