Ok, I just thought of another really great use for it & I'd consider buying it now. Harley can walk for miles and miles because he's a JRT. Morty can walk a lot but not as much as Harley. Sylvia can only walk for about a block or two because she's a Pug and she gets overheated and can't breathe well, but she cries if I leave her home (my dad told me). If I had that I could let Sylvia rest and let Harley and Morty walk. Then after she was rested I could put her back on the leash.