The idea of the hardness is great and for smaller lighter dogs I'm sure it probably works but I have a very strong mix of a husky/staffy and he thinks he is a train! Even with dog training, treats, that why when I saw paro pet harness I was excited. It took AGES to come through the post, over 2/3 weeks. It does fit better than other harnesses but I think it comes loose quicker, so have to keep readjusting.