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Merino wool socks (blended with nylon for durability) made in Northfield, Vermont, with a lifetime guarantee.

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

Tonedale Mill in Wellington, making woollen and worsted cloth — including the original West of England flannel — since 1772.

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.