Wool fleece is made from natural wool, obtained from sheep. After shearing, the raw wool is thoroughly cleaned to remove dirt, grease, and impurities. The wool is then carded, which means it is combed to smooth and align the fibers, creating an even, loose fleece. In some cases, the wool is also spun, but for wool fleece, it is often left unprocessed to maintain its fluffy structure.
In the next step, the wool is lightly felted by controlling moisture, heat, and movement. This causes the wool fibers to slightly interlock, giving the fabric its characteristic soft and cozy texture. Finally, the surface of the wool fleece is lightly brushed to enhance the fluffy feel. This process can be done through brushing or fulling. The finished fabric is then further processed depending on its intended use and cut into warm, breathable clothing or other textiles.