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Merino wool base layers, socks and hats from a fifth-generation New Hampshire woollen textile family business.

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.

North Carolina sock brand from Nester Hosiery making merino wool hiking, everyday, snow, hunting and work socks with an all-US supply chain.

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.