What does spun fabric mean?

Spun fabric doesn't refer to a specific material (like cotton or wool), but rather a method of making yarn.
Typically, synthetic fibers like polyester initially come as long, smooth filaments, similar to fishing line. However, to make them feel more comfortable, they are "broken down and reassembled," resulting in spun fabric.

⇨ How is it made?

From long to short: Imagine long, continuous fibers being cut into short segments (like the length of natural cotton fibers).
Twisted together:  Workers then twist thousands of these short fibers together through spinning and twisting to form a long, thin yarn. This "twisting" process is called "spinning."
Woven into fabric: Finally, the fabric woven from these spun yarns is called spun fabric.

⇨ What's the difference from ordinary fabrics?

More "breathable": Because the yarn is made of countless short fibers twisted together, many tiny gaps are created on the surface. These gaps trap air, so fabrics like spun polyesters are more breathable and less likely to cause sweating than smooth filament fabrics.
Say goodbye to the "plastic feel": Many people dislike synthetic fibers because they feel like plastic, but spun fabrics, with their tiny surface fibers, have a thicker, warmer feel and a softer, less shiny appearance.
Biomimicry expert: This process is amazing; it can transform ordinary polyester to feel like cotton, linen, or even wool.

⇨ Where can you find it in everyday life?

Comfortable clothing: For example, those T-shirts you wear that feel like cotton but dry quickly after washing are often made of spun polyester.
Yarn at home: The rolls of thread your grandmother uses for sewing are basically all made using this process.
Restaurant fabrics: Those hotel tablecloths that look high-quality, feel soft, and don't wrinkle much are mostly typical spun fabrics.