This is a 4 ounce (34 gram) jar of Silicone Art Materials matting powder. This silicone finishing powder is made specifically for silicone -- it's made of cosmetic grade silicone microspheres. It is applied to a finished baby in order to remove shine while also giving it a silky smooth, skin-like feel rather than the rubber feel of untreated silicone. The beauty of this matting powder is that it goes on completely translucent - it does not leave a white cast to your babies, but rather locks in the color just as you painted it.