Scott JUMP RESTRAINT Dog Harness BLACK Dogs can walk or stand on their hind legs, but can\'t jump. The harness restricts only the hind legs and will soon train a dog not to jump. This is a special harness for use during training sessions only. The harness restricts only the hind legs and will soon train a dog not to jump. The black nylon harness fits most dogs in the 20 to 80-pound range...not warrantied against chewing. It does not restrict normal movement. Please never leave your dog unattended while in this harness.