100% no stress formula. Our calming diffuser refill is one of the best anti-stress products for cats that helps to reduce the restless behavior of your pet. The calming effect lasts for 30 days for stressed pets. Contains only natural ingredients. Help relieve nervous tension and anxiety of pets. Reduce and stop the aggressive behavior of your pet and helps protect your house from disorder, scratching the furniture, and other possible troubles. Just plug the diffuser in the wall and it will diffuse the oil smell that will make your cat feel relax.