I use hands-free belts all the time. The explorer pack is comfortable and convenient, unfortunately the plastic clasp holding it onto you is just not good enough. The first belt I bought, it started opening at a sharp tug less than a month after I purchased it. I contacted customer service, who were very helpful and sent me a replacement belt. I used this replacement one for just over two months, and now the same issue is happening again, except worse this time as a strong gentle pull will open it, not just a sharp tug. For occasional use or maybe a very small dog, this belt would be fine, but my 55-pound collie can pull it right off of me now. My best guess is the plastic weakens with repeated use, but I haven't had this problem with other hands-free belts I've used.