Please don't use the wrist straps!!! Buy the harness type ones. They are avalible at babies are us for one. I watched a child fall and dislocate his elbow on one of the wrist type ones, and my PEd. says she has also treated children that this happened to. The harness type ones are much, much safer!!! Sorry for the public service announcement, but it was traumatic for me to watch and appeared t obe very painful for the child. He had run to the end of the lead and then fell. It pulled his arm sort of behind his back and it just popped out!!