This might be our 2nd or 3rd rave review. This has been so instrumental in helping us keep our 13yr old Elkhound as active like she wants to be. We couldn't live without it - it's light enough to keep her cool during summer and I use it all the time to keep things easier on her joints. (On walks, for example, I used to be able to give her a gentle yank when she would find something she shouldn't be eating. Can't do that anymore since she's not as steady on her feet. Now I simply pick her up and "reroute" her back on our walk...) It's been so handy all around, and comfortable for her to wear. We can't recommend the flagline enough!!