I am so happy to have Cardio Canine!  I was so pleased to see the construction of the system and how the waist belt resembled the durability of a climbing harness.  Cirrus, our 4 year old yellow lab has been known to destruct the indestructible, and finally he has met his match!  Where we used to live, he would hike with us without a leash, but as laws changed we were required to use a leash and it was not nearly as enjoyable.  So until now he would concentrate on my hand holding the lead, nipping at it so I would let it go.  Since I don't have to hold on to anything, he doesn't concentrate on me, and I can concentrate on my run!  Thanks for giving us something we can enjoy together!