This Chemical Free Brush Shampoo is the Original.
So pure it's food grade, safe for kids too.

It is a solid shampoo specifically designed to clean and condition your makeup brush and the tea tree adds additional anti bacterial elements. We have balanced our recipe very carefully so that the integrity of the brush hair is not disrupted. This Brush Shampoo cleans deeply and does not over condition.

Cleans and Conditions
Restores and Protects
Easy To Use
Organic
Made In USA
Works with all hair types
How To Use:

Wet your brushes in hot water. Remove the lid and swish the wet brush around on the solid shampoo until it lathers - You'll see makeup lift. Gently work the brush through with your finger tips, or on the palms of your hands, then rinse clean. Press out excess water in a paper towel and leave to dry flat. Larger natural hair brushes will dry in around 35-40 mins, small brushes such as lip brushes can dry in 10 mins. Synthetic brushes may take a little longer.