This stuff really works. I bought it to see if I could restore old knitted kippahs (skulcaps) to new condition, and it worked great. You can't see the stuff at all after it dries. Also, I found that I could reshape the item by wetting it with hot water, setting the new shape, and allowing it to re-dry. I did this several times without reapplying the Stiffy, with no loss of stiffening. I gave it 4 stars instead of 5 because I'd prefer to see some instructions for use and a list of ingredients. Does it contain animal products? Acrylic? Couldn't find anything in the packaging or at the product site.