PA Vinyl Iron On 12 in. x 15 in. Roll Stretch Glitter Purple- Works on lycra, spandex, cotton, leather, polyester, and blends. Has a soft, glitter finish. CPSIA Certified, so its safe on garments for any age. Pre-shrink any shirt with cotton content. Use a quick one-second tack application for layering. Apply with medium, even pressure; preheat fabric for 3 seconds, then apply transfer for 15-20 seconds. Allow 24 hours after application before washing, wash inside out, tumble dry.