I have been using the Cardio Canine leash for several years now and I love walking the dogs hands free.  I usually walk/run two large dogs on the system, sometimes I use it for all three of our dogs-that is over 200 pounds!  The leash is built very well-strong and durable and comfortable on my waist.  I like the pouch attachment as that comes in handy for bags to pick up after them.