(Real wood, bark. Totally pet safe.) <- That is all I could get when I looked them up. I actually have the biggest one they make. My snake is too big to hide in it but he LOVES to tunnel under it and it was the PERFECT aid in his shedding a few days ago. He rubbed his head on it a few times and popped the head skin loose and the rest, as they say, was history. I personally like the looks of the hide too. But Billy gets all over and under it, he just can't curl up under it. I bought him the tree stump hide to replace his box hide I had in there and this snake loves this thing. It has all the room he needs to curl up and get away from it all but when it is time to explore, he is in and out of the holes and wraps around it. He really likes it. It isn't made of wood but really looks like it. It's actually made of non-toxic, easy to clean resin. It's nice and rough (not too rough) for shedding too.