The wool industry is the global network of farms, processing facilities, and manufacturers that turn sheep fleece into textile products. Despite wool’s long history as a fiber staple, it now accounts for only about 1% of the world’s textile supply, dwarfed by polyester (51.5%) and cotton (24.4%). Still, the global wool market is projected to reach $47.83 billion by 2034, growing at roughly 3.1% per year.
Where Wool Comes From
Global wool production totaled about 1.7 million metric tons in 2019. China leads, producing 341,000 metric tons that year, followed closely by Australia at 328,000 metric tons. New Zealand, the European Union, and Turkey round out the top five. Australia, however, dominates the trade in high-quality apparel wool, particularly fine Merino fiber, and its Eastern Market Indicator (a benchmark price for greasy wool sold at auction) sat at 1,541 Australian cents per kilogram clean in late 2025.
Not all sheep produce wool suitable for textiles. Breed matters enormously. Merino sheep grow the finest fibers, with diameters that can dip below 18.5 micrometers (for comparison, a human hair is roughly 70 micrometers). These superfine fibers feel soft against skin and are prized for next-to-skin garments. At the other end of the spectrum, breeds like Lincoln sheep produce coarser, stronger fibers better suited for carpets, upholstery, and heavy outerwear. The internal structure of the fiber differs between breeds too: fine Merino fibers have cell layers arranged side by side in a twisting pattern that gives them natural crimp and elasticity, while coarser fibers have a more concentric cell arrangement that adds stiffness and durability.
How Raw Wool Becomes Yarn
Freshly shorn fleece is far from ready to wear. It’s greasy, full of dirt, dried sweat salts, skin flakes, and often tangled with burrs and seeds. Turning it into usable yarn takes several stages.
Scouring is the first major step. Raw wool passes through a series of wash bowls containing water and detergent, which strip away wool wax (lanolin), dirt, and sweat residue. The clean fiber is then dried. If the fleece contains heavy vegetable matter (more than about 5% by weight), a process called carbonising uses a sulfuric acid treatment to dissolve burrs and seeds that mechanical steps alone can’t remove.
Carding comes next. The wool feeds into a machine fitted with wire-covered rollers that pull apart clumps and tangles, separate individual fibers, remove remaining plant debris, and partially align everything into a loose, rope-like strand called a sliver. From here, the path splits depending on the type of yarn being made. For worsted yarn (smooth, strong, used in suits and fine knitwear), the sliver goes through combing, which removes short fibers and further aligns the long ones, then repeated gilling steps to create a refined strand called “top.” This top is drawn down to about 40 times thinner before spinning. For woollen yarn (softer, loftier, used in tweeds and blankets), the process skips combing entirely. Instead, the card output is split into narrow strips called slubbings, which are given just a little stretch before twisting.
Spinning is the final transformation. It extends the prepared fiber into a continuous strand of yarn with a specific thickness and inserts enough twist to bind the fibers together so the yarn can survive weaving or knitting.
What Wool Is Used For
Apparel is the most visible market: suits, sweaters, socks, base layers, and activewear. Superfine Merino wool has carved out a niche in performance clothing because it regulates temperature, manages moisture, and resists odor. Clinical research has even found that superfine Merino under 16.5 micrometers is well tolerated by people with eczema and may improve skin comfort.
Beyond clothing, wool goes into carpets, rugs, upholstery, mattress padding, and insulation. Coarser breeds supply most of this interior textile market. Industrial uses, though smaller, include felt for machinery, sound dampening panels, and agricultural mulch. Lanolin recovered during scouring is refined for use in cosmetics, pharmaceuticals, and leather care products.
Environmental Impact
Wool is often marketed as a natural, biodegradable alternative to synthetic fibers like polyester, which is derived from petroleum. In principle, untreated wool does break down in soil. In practice, the picture is more complicated. Many wool products are blended with synthetic fibers, which compromises their ability to biodegrade. Dyeing and chemical finishing can also render wool non-biodegradable and introduce toxic pollution into waterways.
Wool production itself carries environmental costs. Raising sheep at industrial scale contributes to greenhouse gas emissions (primarily methane from digestion), land degradation from overgrazing, and significant water use. Wool is not simply a fiber plucked from nature. It is a product of intensive breeding, chemical processing, and large-scale land management. The environmental footprint varies widely depending on how the farm is managed and how the fiber is processed downstream.
Animal Welfare and Certification
Welfare concerns in wool production include rough handling during shearing, a surgical procedure called mulesing (cutting skin folds around the tail to prevent flystrike, practiced mainly in Australia), and inadequate shelter or nutrition on some operations. These issues have driven demand for third-party certification.
The Responsible Wool Standard (RWS), managed by the nonprofit Textile Exchange, is the most widely recognized certification. Farms seeking RWS certification are evaluated on three pillars: animal welfare based on the Five Freedoms (freedom from hunger, discomfort, pain, fear, and the ability to express normal behavior), progressive land management that protects soil health, biodiversity, and native species, and social requirements for workers. The standard also includes chain-of-custody tracking so that certified wool can be traced from the farm through every stage of processing to the final product.
Wool’s Place in the Textile Market
Wool’s market share has been shrinking since synthetic fibers emerged in the late 1800s. Polyester alone now commands over half the global fiber market at 55.1 million metric tons per year, compared to wool’s 1.1 million metric tons. Cotton holds about 24.4%. Wool’s tiny slice means it competes less on volume and more on performance and perceived quality.
That positioning has helped wool hold value even as its volume share has declined. Fine Merino wool commands premium prices, and brands in outdoor, luxury, and athleisure segments continue to feature it prominently. The industry’s growth trajectory of 3.1% annually through 2034 reflects steady demand rather than a dramatic expansion, driven largely by consumer interest in natural fibers, technical performance fabrics, and sustainability claims. Whether wool can deliver on those sustainability promises at scale remains one of the industry’s central tensions.