Functional yarn, also known as performance or technical yarn, goes beyond traditional yarn. It's embedded with advanced features like moisture - wicking, antibacterial, UV - resistant, and temperature - regulating capabilities. This is achieved through special fiber blends or innovative manufacturing processes. For instance, it can be made by integrating high - tech materials into natural or synthetic fibers. Widely used in sportswear, outdoor gear, and medical textiles, functional yarn significantly enhances product performance and user comfort.