Comfort Zone MultiCat Calming Diffuser Refill Only, New 2X Pheromones for Cats Formula 6 PackDrug free solution that helps to calm your cat, reduce destructive behaviors and helps your cat feel more comfortable in their environment Use to help reduce multiple cat household tension, fighting, and stress to help cats live in harmony Helps reduce urine spraying and destructive scratching in the home Contains 2X more pheremones compared to Feliway. Suitable for all life stages Covers one room and lasts 30 days Refills compatible with Feliway