SEI-Color My Own Fabric Markers. Customize your clothing and accessories with these colorful fabric markers. Use them on t- shirts; cotton; or linen. They are water-based; permanent; and can be both machine washed and dried. This package contains six fabric markers. Available in several color sets (each sold separately). Non-toxic. Conforms to ASTM D4236 and EN71 part 1 2 and 3. Imported.