Got two of these, one for each of my dogs - one 65 lber and a 45 lber, both size medium although our heavier dog is actually a lot shorter and more barrel-chested than our long and lean 45 lb husky. My husband is not embarrassed to walk his tough looking dog in the moonlight mountains print harness, and our husky looks sweet as usual in her spring mountains print! They both fit very well and the front attachment is helpful at the start of our walks when they're all amped up, but love to switch to the back ring when they've calmed down and are walking nicely. Quality seems good so far. We have a few other Ruffwear harnesses in different styles and these will be their everyday harnesses for sure.