I couldn't open your link, woof, but
this is the harness I had her in. Note that the description says "escape proof".

Normally I wouldn't use a harness because I don't trust them but we were walking on a quiet dirt road. Quiet until a pickup truck came along. Lesson learned!
Ron, that connector is something I've never seen before. It looks like an excellent safeguard and a really good idea.
This is my
go-to collar and it actually is escape proof. It's the collar I use for conformation shows and impossible for them to get out of. It's a slip lead. I like these because they're nylon and actually do "slip" when there's no tension on them so unless the dog pulls, it doesn't tighten. It's not what I had her in the second time she escaped. I had her in a regular collar with her name tag since we were going to the vet for tests. Not a mistake I will make again! Panic mode for sure. This vet is on a busy main road and all the worst possibilities ran through my head as I chased her. I was lucky enough to corner her near a snowbank in the next parking lot and when she knew she was stuck she grudgingly came to me. I think I aged another 10 years.