Perfect fit for a whippet as all sides are adjustable. Weight is distributed well so he is ok when he pulls. No worries when we go to run or hike and climb. Does not rub the body for a whippy too. We used to use K9 before but without extras the harness did not distribute weight well, aslo he could get out of it. This one impossible to get out and if I need to grab him and lift him suddenly there is no problem.