I found these curtains by chance while looking at acoustic treatment for my home studio. Needed sonething to cover my window and at the same time didn't want to board it up - have a great view from my studio. These curtains are a god send - real acoustic treatment in a curtain. I was surprised at the weight, real heavy and you know right away that this is going to do the job of acoustic treatment. Highly recommended - Oliver Sean www.oliversean.com