I had one of the Morrell Yellow Jacket "Weatherproof" broadhead targets. It's weatherproof alright, but not SUN proof. After a month of being outside, the thing fell completely apart. The only thing that holds it all together is plastic wrap. Morrell told me that it's not really designed to be left outdoors. In that case, who cares if it's weatherproof? It's layers of foam, with cardboard sheets in between. Spent an afternoon picking all that crap up out of my yard.