Soothe your feline friend with Tranquil Tails Peaceful Purr Calming Pheromone Diffuser Refill Pads for Cats, designed for use in the Tranquil Tails Waterless Aromatic Pheromone Vaporizer Diffuser (sold separately). These pads release a calming blend of essential oils and pheromone isolates to ease stress caused by separation, thunderstorms, fireworks, or other stressful times. Made in the USA, each pad is precisely dosed in the Tranquil Tails Wisconsin manufacturing facility and is available in multiple pack sizes and scents.