In this lesson, students continue to explore synthetic materials used in textile production, focusing on synthetic fibers such as polyester, nylon, acrylic, and Lycra. Key characteristics of these materials are discussed, such as their versatility, elasticity, and resistance to various conditions. Examples include winter clothing, summer garments, and other items like blankets and carpets made from acrylic fibers. The lesson also addresses potential disadvantages of synthetic fibers, including skin irritation and reduced breathability in high temperatures.