Comfort Zone Calming Collar. The Comfort Zone® Calming Pheromone Collar for Cats provides continuous comfort for on-the-go cats, whether they're indoors or outdoors. This collar can help your cat's "e-meow-tional" health by using our trusted pheromone formula. The Comfort Zone® Calming Pheromone Collar for Cats is veterinarian recommended and mimics your cat's natural pheromones, helping keep your kitty more comfortable during stressful situations, like moving, remodeling, traveling or visiting the vet. The collar promotes a sense of relaxation, which is "purrfect" for on-the-go cats. By relaxing your kitty, this collar will help curb stress behaviors like spraying and destructive scratching. PROVEN FOR: Urine Marking Scratching Travel & Vet Visits MAY HELP WITH: New Cat Adoption Moving to a new home Traveling How the Collar Works Your cat's body heat activates the pheromones in the collar. The collar continually releases calming notes as your cat wears it. The cat pheromone collar has an easy-release feature for your cat's safety. The Breakaway® collar will release if the cat becomes entangled in an object like a fence or tree. Step-by-Step Guide for Use Open the pouch only when you're ready to place it on your cat. Put the one-size-fits-all collar around your cat's neck and snap it in place. It should fit comfortably around the neck, ensuring the collar won't slip off. Your cat should wear this collar 24/7, whether indoors or outdoors. Replace the collar every 30 days. Note: This product is not for use on kittens. Ensure a Proper Fit Place the collar around your cat's neck, adjust it to fit and buckle in place. A properly fitted collar is one that, when fastened, fits comfortably around the neck. You should be able to fit one or two fingers between the neck and the collar with the fingers flat against your cat's neck.