I have bought at least six harnesses over the past six years for our staffy. Every single one would rub under her armpits and cause horrible sores (staffys don't register pain - they will just keep going despite their skin being rubbed raw). I looked at companies making harnesses just for staffys but I could see the harness still came right under the forearms. Then I contacted Brilliant K9. BRILLIANT! indeed. Wow! Finally, a harness designed to sit (and stay!) well back from the underarms. I'm in Australia and this company is in USA. The communication was brilliant, the postage was reasonable (don't let the postage cost put you off - chat to them first!) and it arrived a lot quicker than I expected. The harness is perfect. It doesn't stop her pulling (nothing has) but it doesn't slip down her front legs, it doesn't rub against her armpits, and she can't wriggle out of it. We are very happy customers. Thank you Brilliant K9.