content: I had bought one of these for my old dog (a large German Shorthaired Pointer) who had a horrible pulling problem. And it worked perfectly for him, and he didn't seem to mind. On the other hand I just bought one of these for my 10 month old Coonhound, and it also worked to stop his pulling. But he hates it! I can't take him for a walk without him trying to get it off atleast 3-6 times. I think this may just be because he loves to sniff the ground so much that this kind of makes his head go higher up, but now I have to order him something else to stop his pulling because of what difficulty it is to use this for him. Other than that amazing product in it's self.