I've been using invisible elastic thread for years, and though this thread is strong AND elastic, it is definitely not invisible. The fact is, I tried performing with this thread in a variety of settings and the light not only bounced off of it, but the string's thickness made it clear for all to see. I tried painting the thread black (its not completely black) but this just made the thread thicker. We can go on all day about how thick or strong the thread is, but the thread cannot work as long as it's this thick, shiny and visible and it twists in the light for all to see. I see a lot of positive feedback on all of the forums, but I don't see where all of the hype is coming from, the product is physically strong, but not much else. I expected more from this product, unfortunately I was let down.