“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 ...

Base layers keep you dry and warm outside. Merino wool base layers are the best you can buy. But what are they and why are ...

Thermal underwear for men that uses mostly polyester usually requires less work to maintain the original shape after laundering it, whereas merino wool stretches out if you don’t dry it flat and ...