We recently adopted a 3-4 year-old dog who had been crated most of his life (for several hours at a time) and is reactive to other dogs on our walks. We didn’t know much about him when we brought him home so we ordered the same basic harness for him that our other dog has used for 10+ years. Well he weaseled his way out of that one three times when he got upset by passing dogs, so we tried another one that provided more coverage. This one worked but I could tell he was too strong for it. Finally we splurged a little on this harness (figured it was worth the money if it was going to keep him safe) and it has been great! As long as it’s adjusted properly we don’t have to worry about him slipping out. We loved it so much that we ordered one for his brother so they can match on our walks. Highly recommend this harness!