This is a great design for pullers. I have a large standard poodle and wanted to see if this would help manage his pulling and it worked super well! Now I will invest in the thicker width and larger size so that it is adequately designed to manage his weight and strength. This less expensive model was a great trial way to determine if it would help because we have numerous brands of harnesses we have tried and they failed the test. The FREEDOM is a keeper!!