RE: DB Blinds.....HOW "waterproof"?
I hunted in my DB when it was raining and I never got wet but it wasn't like a down pour either.
My advice to you is to get a can of that water repelent that you spray on leather boots and use it on the blind , you might want get 3 or 4 cans.
It's not going to hurt or damage the blind in any way , just set your blind up in your yard and spray the roof real good and then the sides.
Leave it out to dry and your good to go , you could PM gregholland and ask him he's a DB dealer , he should be able to answer your question.