My Aussie Katie is in her new Ruffwear harness a lot as she recovers from ACL surgery. I got the brush guard thinking it might be a good idea. It's a great idea and Katie loves the full cushy support it provides underneath her and on her chest. It keeps the harness in place. I think she's a lot more comfortable with me lifting her up by the harness handle with the excellent underbody support provided by the brush guard. I tell people she's my 47 pound purse right now. It was easy to attach to the harness and is a perfect fit within it. Katie has lots and lots of hair all over her torso, and it is easy to keep it smooth inside and outside the brush guard -- no static electricity!