PA Vinyl Iron On 12"x 20" White- Has an ultra-thin, soft, and matte finish. Works on lycra, spandex, cotton, leather, polyester, acrylics, and blends. Pre-shrink any shirt with cotton content. Use a quick one-second tack application for layering. Apply with firm pressure; preheat fabric for 3 seconds, then apply transfer for 15 seconds. The premium choice for: t-shirts, sports apearal, and leisure wear. Not recommended for nylon or water resistant fabrics.