Four kinds of wool are mixed in a golden ratio to create a soft & delicate brush stroke & with an octagonal pen tube it is easy to draw the desired lines & paint. Add WP Film Technology can be removed with warm water no makeup waterproof oil & sweat resistance. In addition to this it contains no preservatives alcohol & gluten-free & any animal-derived ingredients (including milk eggs honey). It has also been tested for allergy & is very mild.