Poplin is a lightweight, plain-weave fabric made from cotton or a blend of cotton and synthetic fibers. It is often used for shirts and other garments. Polyester is a synthetic fabric made from petroleum-based products. It is often blended with other fabrics to create a more durable fabric. Dacron is a brand name for polyester fabric, which is known for its wrinkle-resistant and quick-drying properties. All three fabrics are commonly used for making shirts.