Merino wool comes from the merino sheep, a breed that originated in Spain in the 12th century and is now farmed mainly in Australia and New Zealand. New Zealand produces some of the world's finest merino, with much of it grown in the South Island high country.
Where does merino wool come from originally?
The merino breed developed in Spain. Some historians trace the ancestors to North African sheep brought by the Berbers; others credit selective breeding from local Iberian flocks. Either way, by the late Middle Ages the breed was established, and Spanish merino wool was the most prized fibre in Europe.
Why was Spain so protective of merino sheep?
Merino fleece was a strategic asset. From the 12th century until the 18th, Spain enforced a strict export ban on live merino sheep — at one point under penalty of death. The Spanish crown ran one of history's most successful trade monopolies on the back of this single breed.
How did merino sheep reach New Zealand and Australia?
The Spanish monopoly broke in the late 18th century, when small flocks were given as diplomatic gifts (and in some cases smuggled) to other European courts. From there merinos spread to South Africa, Australia (1797) and New Zealand (1814). Both countries' climates and grasslands suited the breed, and within a few decades they were producing fine wool that competed with the Spanish original.
What makes New Zealand merino different?
New Zealand merino is grown almost exclusively in the South Island high country — cold, dry, mineral-rich land. The combination of altitude, low parasite pressure and harsh winters tends to produce a fibre that's both fine and resilient. New Zealand merino is generally cited as among the finest in the world, with much of the clip falling between 17 and 21 microns.
When did merino become popular for outdoor clothing?
Merino had been used in clothing for centuries, but its rise as a technical outdoor fabric dates to the late 20th century, when brands began marketing its specific performance properties — moisture management, odour resistance, temperature regulation — as an alternative to synthetics. Today it's the dominant natural fibre in technical base layers worldwide.
Is merino wool ethical?
It depends on the supply chain. New Zealand merino is generally raised under strict animal welfare codes, and the country banned mulesing decades ago. (Mulesing is a controversial practice still used in parts of Australia.) When buying merino, the source country and the brand's transparency about it are the most useful indicators.
Frequently asked questions
What's the difference between merino and other wools?
Merino fibres are far finer than common-breed wool. Where general sheep wool is typically 30+ microns and feels coarse, merino is 17–24 microns and feels soft. The processing is similar; the difference is the fleece itself.
Are all merino sheep the same breed?
They share the merino lineage but have diverged into distinct strains: Spanish merino, Australian merino, New Zealand merino, Saxon merino, Rambouillet (the French derivative), and others. Each strain has slightly different fibre characteristics.
Is New Zealand merino better than Australian merino?
Both produce excellent fibre. New Zealand has historically led on animal welfare standards and the country's cooler climate produces a slightly denser fleece. Australia produces vastly larger volumes and is the dominant global supplier. Quality varies more by individual farm and grade than by country.
How long has merino been worn as clothing?
Roughly 800 years. Spanish royalty wore merino in the medieval period; it has been continuously used for clothing in some form ever since.
NZ-grown merino, made in New Zealand
Smart Merino's Brass Monkeys range is made in New Zealand from premium merino — keeping the entire supply chain, from fleece to finished garment, close to home.
