Satin is a weave and not a fiber. It can be either silk or man-made fibers such as polyester or nylon. The satin weave produces a shiny surface on one side and a dull finish on the other.

Because satin is a weave pattern, you can have a satin fabric ... a satin pillowcase can be weaved with other fabrics, such as polyester, nylon, cotton and more. Textile expert Karen Leonas ...