This is a beautifully made costume.  Heavy-weight, polyester satin and organza.  I've washed it and hung it to dry; it held up beautifully.  It even has alterable seams. It was perfect for Cinderella at the ball in "Into the Woods."  I have never seen such quality costumes offered on Amazon.  Congratulations, Angelaicos.  Well done.
The picture I've attached is before pressing.