Product Description Speedball Flex Fabric Screen Printing Inks are an advanced water-based ink designed to be flexible across a variety of materials. High Opacity: Inks deliver bold, rich color whether printing on light or dark fabrics Maximum Flexibility: Ideal for use on cotton, polyester, rayon, and synthetic fibers while resisting cracking or peeling when fabric is stretched or pulled Soft Hand: Fabric remains soft to the touch Permanent: When properly heat set, inks maintain rich, vibrant color for life of the garment Limitless Palette: Create your own signature palette by mixing any FLEX Inks