The Shoulder Collar is a brilliant invention to keep our little dogs safe and under control. It's one of those "Why didn't I think of that?" inventions! The Shoulder Collar even has a U.S. patent. The Shoulder Collar is easy to put on your little dog: he just steps into the holes, bring the collar up over the dog's back. Lay the right side (with the leash ring) down first and insert the leash ring through the slit on the other part and secure the velcro. Attach the leash and you're ready to go!