It is a brush with synthetic bristles, you wet it, shake a few times and it spreads the solution on the paper without absorbing any of the solution. It is really cool, I started with Hake brushes and let me tell you, the difference is like night and day. I strongly recommend you get it. Cheap Joe seems to have the best price.Originally Posted by Ray Bidegain
From what I understand it is designed for watercolor painters to spread the water on their paper.