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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.

American basics label known for Pima tees in US-grown Supima cotton, plus slub and hemp tees; some styles knit and sewn at its own Pennsylvania mill.

Irish linen weaver since 1912, operating from what it calls Ireland's oldest remaining linen mill, with its own dyeing and finishing works.

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