I bought this for a dog with tracheal issues. It fits very well with a low cut front. I had been using a Ruffwear harness, which I liked, but it did push on my dog's trachea. This harness is working really well for that issue. My only very slight complaint is that the buckle strap slides side to side over the fleece (behind the elbow) so sometimes the fleece is pushed to the rear. I may add a stitch to keep the strap centered on the fleece.