ORIGINAL: paintbrush
What I wonder about is what are the feathers attached to and how are they attached? Are what the feathers attached to a water proof material and if they are glued on, is the glue water proofso they wontcome off after a short period of time.
They look like a good idea for more realizam though.
I asked those same questions in their forum, on they're website. I'll post with their reply.