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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.

WFTO-member Fair Trade knitwear maker in Lima producing alpaca, cotton and merino knits for designer brands under private label and its own MKM label.

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.

Portuguese fully-fashioned knitwear factory producing for major brands and chains in cashmere, merino, silk and fine cottons including Pima and Sea Island.