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| Darn Tough✕ Merino wool socks (blended with nylon for durability) made in Northfield, Vermont, with a lifetime guarantee. | Fiorima✕ 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. | TS Designs✕ Burlington, North Carolina B Corp t-shirt maker using only natural fibers (US-grown cotton, hemp, wool), offering eco printing and garment dyeing for brands. | Icebreaker✕ Merino outdoor and base-layer clothing; some fabrics blend merino with nylon, lyocell or elastane. | |
|---|---|---|---|---|
| Type | Brand | Manufacturer | Manufacturer | Brand |
| Location | Northfield, Vermont, US | Braga, PT | Burlington, US | Auckland, NZ |
| Fibers | Merino | Organic cotton · Merino | Cotton · Hemp · Wool | Merino |
| Makes | Socks | Socks | Tops & tees | Base layers, Tops & tees, Underwear, Socks, Outerwear |
| Services | — | Knitting | Printing, Dyeing | — |
| Entry price | $$ · Pair of socks $24.00 | — | — | $$ · Base layer top $89.45 |
| Min. order | Not stated | Not stated | Not stated | Not stated |
| Certified | None listed | GOTS, OEKO-TEX Standard 100, Responsible Wool Standard | B Corp | ZQ Merino |
| Natural | Not 100%. Some blends | Not 100%. Some blends | 100% natural | Not 100%. Some blends |
| Founded | 2004 | 1985 | — | — |