The basics Marvy Uchida-DecoFabric Laundry Fabric Marker. Stays on when washed!  The benefits The ink is water and chlorine resistant, non-toxic, odorless, permanent and dries quickly. The uses Perfect for fine detail on most smooth fabrics for wearable art, fabric embellishments and home decor. The bottom line This black felt tip fabric marker is for use on most fabrics with no need to heat set. Conforms to ASTM D4236