The short answer is also an easy answer: no. Polyester, a synthetic material, can be made in such a way that, when woven with a satin finish, mimics many of qualities that attract consumers to silk satin. But, buyer-beware, this material isn’t breathable and won’t have the same wearability and durability as silk satin. It’s a great choice for costuming, however, since it only needs to look the part rather than be it in reality.