I just got one a few weeks ago. I don't know what they are made of but it is tuff. I attached a strap to mine so it would go on my vest. I BROKE a U-shaped needle and bent a heavy staight needle trying to sew the strap to it. I was quite impressed with how tuff it was, so I feel like it is going to hold up good. I know from what little I have sat on it so far that thing is way better than any other one I have tried to use turkey hunting.