There are a number of fabrics that are commonly used to make curtains and drapes. The fibres that are used to manufacture the material determine how well it will wear and wash and how well it will hang at your window or door. The yarns used to construct the fabric can be man-made or animal or vegetable in origin. A curtain rod is passed through the channel to hang. Thermal or blackout curtains use very tightly woven fabric, usually in multiple layers. They not only block out the light, but can also serve as an acoustic or thermal dampener. Curtain liners are used to protect actual curtains from getting wet.