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| Darn Tough✕ Merino wool socks (blended with nylon for durability) made in Northfield, Vermont, with a lifetime guarantee. | Ibex✕ Merino wool outdoor clothing — base layers, socks and jackets — founded in Vermont in 1997, now based in Boulder. | IAFIL✕ Spinner of natural-fiber yarns in cotton, silk, linen, cashmere and alpaca for knitting and weaving. | Michell & Cia✕ Vertically integrated Peruvian alpaca group making tops, knitting yarns and fabrics in pure alpaca and blends. | |
|---|---|---|---|---|
| Type | Brand | Brand | Mill | Mill |
| Location | Northfield, Vermont, US | Boulder, US | Milan, IT | Arequipa, PE |
| Fibers | Merino | Merino | Cotton · Silk · Linen · Cashmere · Alpaca | Alpaca · Silk · Merino · Linen |
| Makes | Socks | Base layers, Socks, Outerwear | Fabric & yarn | Fabric & yarn |
| Services | — | — | Spinning | Spinning |
| Min. order | Not stated | Not stated | Not stated | Not stated |
| Certified | None listed | None listed | Masters of Linen | None listed |
| Natural | Not 100%. Some blends | Not 100%. Some blends | Not 100%. Some blends | Not 100%. Some blends |
| Founded | 2004 | 1997 | — | — |