Please check the video uploaded by seller ' Safety tips for untrained cats', please take the time to train your cat to not attempt to back out the harness, if your cat backs up, instantly slacken the leash and do not give your cat act something to pull against. Your cats may be frightened at any noise, any people, dogs, cars, please choose a SAFE LOCATION outdoors to walk your cat, ideally your front yard, back yard or in a quiet neighborhood or park. Stay way form high traffic or crowded areas that can frighten your cat.