Flashcotton looks like ordinary white cotton. When a flame, cigarette, spark, or other fire source touches the cotton, it violently incinerates into a flash and leaves absolutely no visible residue. Note that we cannot sell this item to minors. Also it is AGAINST FEDERAL LAW for us to ship this item through the US Mail. It must be picked-up at our store or shipped through UPS for additional charge. 374RUMHAZ_FLASHCOTT