This is a really nice quality set. It's so easy to put on with the velcro and then the round clip. The leash is a good length as well. I was at one of the large pet stores today and they wanted 28 bucks for a similar harness with no leash. Can you imagine $28 for just the harness that was so very similar? Why would anyone pay that? This is definitely the best deal ever and the quality is really good as well. Buy this one after you measure your dog and choose the right size--you can't go wrong! Hope this helps you make your decision.The harness is a comfortable fit ... but on warm to hot days it makes her to hot ;;; But our area has more cold days then warm so it will be very nice this winter and spring ... It was a nice value ...There is enough information online to determine the correct size for a puppy. We ordered a second larger size once our puppy outgrew the original harness. We probably could have stayed a bit longer in the smaller size.The harness is well made and very stylish. Wish there were more color choices, but. the blue harness we chose is very good.Quality made, very sturdy. I got the medium for our GSD puppy but it was too big and will need to wait until she grows into it. Her current weight is 8 pounds at 8 weeks old so if you decide to buy know that it's important to measure your puppy or dog first.I personally recommend this product to any dog owner. I love how it hugs my puppy chest. The overall quality of the product and even how it’s reflective it is in the night time. As far as stretching??? That’s a weird question.I love this so much more than a regular collar and leash, because with this, you never have to worry about choking your animal. Also, some dogs can get out of their collars, which could also be unsafe if you are near a busy road or something. This provides me with security and takes away unnecessary worries.It worked great until a piece broke off.I like it but I believed I need a larger size other wise it’s good