Package contents: you will get 4 calming cat collars to relieve your cat's anxiety and the sufficient quantity for your replacement; 4 boxes for convenient storage Safe and effective: the ingredients including lavender and chamomile essential oil are safe for pets and human; The calming cat collars start working within 1 hour of wearing and will release pheromones for lasting up to 60 days, which is suitable for cats of most ages and breeds without side effects One size fits most: this cat calm collar has an adjustable size up to 38 cm/ 15 inches, fitting most cats and even small dogs; There is a latch which can hold the collar steadily and easy for you to adjust the collar Wide applications: this calming collar works well in many stressful situations such as, thunderstorm, separation from the owner, travelling, excessive noise or any other situation that can do your cat being nervous, preventing inappropriate stress reaction such as excessive meowing, pee marking or furniture scratching; You can tie the pendant to the collar to make your cat more stylish and adorable Comfortable to wear: this reducing anxiety cat collar is made of quality silicone, which is reliable and waterproof; The calming effect won't be affected in the water so that you can keep it when the cat is in a bath; The soft and flexible texture makes your cat wear comfortably without burden