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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.

Norwegian knitwear house making women's sweaters, cardigans and dresses in its Ytre Arna factory from merino wool, silk and alpaca.

Family-owned, vertically integrated Tiruppur mill and garment maker, an early promoter of organic cotton in India, supplying organic cotton jersey to brands.

Mount Airy, North Carolina wool sock mill that knits merino socks for private-label clients such as REI and L.L.Bean, makes licensed lines, and owns Farm to Feet; some programs use synthetic yarns.