Fabric is an important part of choosing curtains, as the material will determine how well your curtains will function and last. Some fabrics can help keep out the cold. Many hotels use suede, velvet, tapestry or tweed because their weight helps block light and keep heat in. However, al any fabric can be lined with thick bumps of insulating felt material.
There are many fabrics that are commonly used to make curtains. The fibers used to make the material determine its resistance to abrasion and washing, as well as how well it hangs on windows or doors. Yarns used to construct fabrics can be man-made or of animal or plant origin.
One of the useful fabrics in an interior designer's resource toolbox is cotton. It is a vegetable fiber and in its simplest form it is called calico. This is a medium weight cotton, unbleached, plain weave. It's relatively inexpensive and has a matte finish, so it can be used luxuriously to create eye-catching and strong curtains.