The chapter discusses the creation and properties of continuous carbon nanotube (CNT) yarns, which can be used to construct macroscopic devices and structures. By drawing CNTs from superaligned arrays, researchers have successfully produced yarns up to 30 cm long and 200 μm wide. These yarns exhibit enhanced strength and conductivity when heated at high temperatures. The process is similar to pulling a thread from a silk cocoon. The yarns can be used to create light-emitting filaments and polarizers, demonstrating their potential for various applications such as bulletproof vests and electromagnetic wave blockers. The study highlights the mechanical, electrical, and thermal properties of CNTs at a macroscopic scale, paving the way for further development in nanotechnology.The chapter discusses the creation and properties of continuous carbon nanotube (CNT) yarns, which can be used to construct macroscopic devices and structures. By drawing CNTs from superaligned arrays, researchers have successfully produced yarns up to 30 cm long and 200 μm wide. These yarns exhibit enhanced strength and conductivity when heated at high temperatures. The process is similar to pulling a thread from a silk cocoon. The yarns can be used to create light-emitting filaments and polarizers, demonstrating their potential for various applications such as bulletproof vests and electromagnetic wave blockers. The study highlights the mechanical, electrical, and thermal properties of CNTs at a macroscopic scale, paving the way for further development in nanotechnology.