Curtains are soft window treatments that are used to either block out light from a window, add privacy, and/or add a decorative touch to a room. Curtains can be made from a variety of fabrics including cotton, polyester, and velvet and can be hung using various types of rods, such as traverse rods, rod pocket, grommets, or even tension rods. Curtains come in many different styles, such as sheers, solid-color panels, valances, swags, and more. In addition, curtains can be lined in order to provide extra insulation and noise reduction.