Shredded mylar and metallic film that is soft, and easy to card. This sample pack contains approximately 1.3 gram each of all 15 colors of the Crystal Metallic fiber we carry. Great for adding sparkle to fiber for spinning, felting, surface design, and more. The iridescent crystal metallic fibers reflect and pull light into the fiber with which they are mixed. A little goes a lo-o-o-o-o-ong way!