Merino wool comes from Merino sheep, a fine-wool breed developed in Spain over centuries of selective breeding.
The deeper ancestry of the Merino is still debated, with evidence of influences from sheep native to the Iberian Peninsula as well as animals brought from elsewhere in the Mediterranean and North Africa. What is much clearer is that Spain became the historic home of the Merino breed and that Spanish Merinos went on to form the foundation of Merino populations around the world.
From Spain, Merino sheep gradually spread across Europe and eventually to Australia and New Zealand, where generations of selective breeding produced animals adapted to very different landscapes and climates.
Today, Merino wool has moved a long way from its historic association with traditional woollen clothing. Its fine fibres, ability to manage moisture and natural resistance to odour have also made it an exceptional material for technical outdoor clothing.
But its story begins centuries ago.
Where did Merino sheep originate?
The origins of the Merino are more complicated than is sometimes suggested.
Historical and genetic research points strongly towards the Iberian Peninsula as the place where the breed developed. Sheep were being selectively bred for increasingly fine wool in Spain many centuries ago, with some evidence suggesting that this process may have roots as far back as Roman times.
The sheep involved were not necessarily from a single ancestral population. Researchers have proposed influences from native Iberian sheep alongside animals from Italy and North Africa.
What followed was a very long period of selective breeding in Spain, increasingly focused on one particularly valuable characteristic: exceptionally fine wool.
Over time, the Spanish Merino became sufficiently distinctive and influential that its genetics would eventually be used to develop Merino and Merino-derived breeds around the world.
Where does the name 'Merino' come from?
Even the origin of the word Merino isn't completely settled.
Several explanations have been proposed over the years, including connections with medieval Spanish terminology and North African history.
Rather than having one universally accepted origin, the name reflects some of the uncertainty surrounding the breed's very early history.
Fortunately, the later history of the Merino is much better documented.
Spain and the rise of Merino wool
By the Middle Ages, fine Merino wool had become an extremely valuable Spanish commodity.
Central to this story was the Mesta, a powerful organisation of Spanish livestock owners established in the 13th century. Huge flocks moved seasonally between winter grazing in southern Spain and summer pastures further north.
This movement of livestock between seasonal grazing grounds is known as transhumance.
Spain also tightly controlled its valuable Merino bloodlines. For centuries, restrictions prevented breeding animals from being freely exported, helping Spain protect the quality and economic importance of its wool industry.
That began to change during the 18th century.
Spanish Merinos started reaching other European countries, where they were crossed with local sheep and used to establish new fine-wool populations.
Merino sheep reached countries including France, Germany, Austria, the Netherlands and Britain.
From there, the breed's influence spread much further.
How Merino sheep reached Australia
One of the most important moments in the modern history of Merino wool came in 1797.
Captain Henry Waterhouse and Lieutenant William Kent brought a flock of 26 Merino sheep from the Cape of Good Hope to Port Jackson in Australia.
The sheep themselves had an extraordinary history. They descended from Spanish Merinos given to the Dutch royal family and subsequently sent to the Cape.
The voyage to Australia was difficult and more than half of the flock died before reaching its destination.
The survivors, however, helped establish what would eventually become one of the world's most important wool industries.
Australian farmers and breeders continued selecting Merinos for local conditions, developing distinctive strains particularly well suited to Australia's landscape.
Within generations, wool had become one of Australia's most important exports.
Today the association between Australia and Merino wool is so strong that it's easy to assume the breed originated there. In reality, Australian Merino is the product of Spanish ancestry followed by more than two centuries of breeding and adaptation.
Merino wool in New Zealand
Merino sheep also played an important role in the development of New Zealand's wool industry.
Large numbers of Australian Merinos were transported across the Tasman Sea from the 1840s onwards. New Zealand breeders subsequently introduced bloodlines from Europe and elsewhere to improve their flocks.
By the 1880s, a recognisable New Zealand Merino type had developed.
Merinos became particularly associated with the drier high-country landscapes of the South Island, where the breed was better suited than it was to wetter areas.
That heritage continues today, with New Zealand fine Merino becoming particularly well known within premium and technical clothing.
It's also part of the modern Merino story that matters directly to us at Manumit. The Nuyarn® fabric used in our Trail Sun Hoody uses New Zealand Merino wool.
Where does Merino wool come from today?
Merino sheep are now farmed in a number of countries, but Australia remains particularly important to global Merino production, while New Zealand has developed a strong reputation for fine wool used in premium apparel.
Modern Merino isn't therefore tied to a single country.
The breed originated and developed in Spain, but centuries of selective breeding have subsequently created Merino populations adapted to environments on the other side of the world.
For clothing, where the wool comes from is only part of the picture. Fibre diameter, farming standards, traceability, processing and the construction of the final fabric all influence how a Merino garment ultimately performs.
Why is Merino wool so good for outdoor clothing?
The characteristic that originally made Merino so valuable was the fineness of its wool.
Fine fibres can produce fabrics that feel considerably softer against the skin than the coarse wool many people associate with traditional jumpers. That makes superfine Merino particularly suitable for clothing worn directly against the body.
But softness is only part of the reason we use it.
Temperature regulation
Wool is a hygroscopic fibre, meaning it can interact with moisture vapour in the surrounding environment.
That moisture behaviour can help buffer changes in the microclimate between your skin and your clothing, which is one reason Merino works particularly well in changing conditions.
Rather than simply describing it as "warm", we think of Merino as a material that helps regulate temperature.
Odour resistance
Merino is also naturally resistant to the build-up of body odour.
Research comparing clothing fibres has found substantially greater odour intensity in polyester than in wool under wear-test conditions.
For outdoor clothing this matters enormously. A top that can comfortably be worn for longer between washes is useful on everything from a day on Dartmoor to a multi-day trip where carrying several changes of clothing isn't practical.
Moisture management
Wool can absorb moisture vapour within its fibre structure while still feeling relatively comfortable against the skin.
That doesn't mean Merino behaves exactly like a synthetic wicking fabric. It manages moisture differently, and that difference is part of what gives wool its distinctive comfort across varying temperatures and activity levels.
Why we chose Merino for Manumit
When we started Manumit, we weren't looking for an unusual fabric simply to differentiate the brand.
We wanted clothing that worked for the way we actually spend time outdoors.
Here in the UK, a single day can involve cold starts, hard climbs, wind, sunshine, sweat and long periods standing around afterwards. We wanted clothing capable of being comfortable across those changes without requiring a constant succession of layers.
Merino made sense.
Our 100% Merino Wool T-Shirts use superfine 17.5 micron Merino at approximately 150 gsm, creating a lightweight layer designed for hiking, running, climbing, travelling and everyday use.
For our Trail Sun Hoody, we took a different approach, using Nuyarn®, a performance fabric made with 70% New Zealand Merino wool and 30% nylon. The result combines many of the characteristics we value in Merino with additional durability and a construction designed for active use.
Different fabrics for different jobs, but the same underlying material philosophy.
From Spanish sheep to modern outdoor clothing
The history of Merino wool stretches across centuries and continents.
Its roots lie in Spain, where generations of selective breeding created sheep prized for exceptionally fine wool. From there Merinos spread across Europe before becoming fundamental to wool industries in countries including Australia and New Zealand.
Modern Merino clothing might look very different from the wool garments of centuries ago, but much of its appeal comes from exactly the characteristic breeders were selecting for all those years ago: remarkably fine natural wool.
For us, that's what makes Merino particularly interesting.
It's an ancient natural fibre that remains remarkably well suited to modern adventures.
Frequently asked questions
Where does Merino wool come from?
Merino wool comes from Merino sheep. The breed was developed in Spain over centuries of selective breeding before spreading to other parts of Europe and eventually countries including Australia and New Zealand.
Are Merino sheep from Spain?
The recognised Merino breed developed in Spain, although its deeper ancestry is complex and remains debated. Research suggests influences from Iberian sheep as well as other Mediterranean and North African populations.
Why is Australia famous for Merino wool?
Merino sheep arrived in Australia in 1797. Australian breeders subsequently developed Merino strains suited to local conditions, and fine wool became enormously important to Australia's economy and export industry.
Is Merino wool only produced in Australia?
No. Merino sheep are raised in several countries. Australia is particularly important to modern Merino production, while New Zealand is also well known for fine Merino used in premium and performance clothing.
Is Merino wool good for hiking and outdoor clothing?
Merino's fine fibres, moisture management, temperature-regulating characteristics and natural resistance to odour make it particularly useful for clothing worn during outdoor activities and for extended periods between washes.