All JK9 harness types have proven their reliability over decades of use, with tests and recommendations from animal welfare organizations supporting their trusted design. The Longwalk harness, in particular, stands out with its Duo-Flex system, which has even won awards as a joint-friendly harness.
It’s important to note that harnesses came into the spotlight decades ago because they spared the dog’s neck and breathing compared to collars. The chest strap of the Powerharness sits far from the dog’s neck, distributing the force during walks across the height of the dog’s sternum. For the Longwalk and Speed Y-harnesses, proper sizing and adjustment are especially important to protect the neck.

JK9 Power harness design for free breathing and free throat