This last spring I found a couple of great natural horse brushes at the MWHF and decided to give them a try. I had always thought a brush was a brush but since I got the new ones I don't think I can go back to synthetic.
The biggest thing I noticed was that the new brushes don't collect the grease and dirt the way my old synthetic ones did. My horses shine more now than they used to, I hardly ever find myself grabbing for the show sheen any more and people are commenting more on how my horses are so shiny.
Will they really hold up however. The place I got them said you can even get them wet to wash them when they do get dirty.
These are the brushes I have