Compare

Merino wool outdoor clothing — base layers, socks and jackets — founded in Vermont in 1997, now based in Boulder.

Norwegian wool brand making merino wool base layers, thermal underwear, fleece-wool layers and beanies, using New Zealand merino knitted in its own Estonian facility.

Sock maker near Braga, Portugal, producing about 3.5 million pairs a year in organic cotton and merino for department stores, chains and brands such as Asket.

Montana brand making US-made merino wool shirts, base layers, sweatshirts, jackets and socks from wool grown on the Helle family ranch and Rocky Mountain growers.