The Fido Fizzies - Zen Puppy Dog Anxiety Relief Calming Collar With Dog Appeasing Pheromones And Lavender Essential Oil Blend is designed to help with dog anxiety and create tranquility for your life. Made with natural ingredients including pheromones, lavender, and chamomile essential oils, this collar is safe for long-term use. By using our calming dog collar, you can help your furry friend feel more at ease during stressful situations such as fireworks, thunderstorms, and separation anxiety. With regular use, you may notice an improvement in your dog's overall behavior and well-being. There are 3 adjustable collars included, for up to 6 months of use by your pup. Each collar lasts for approximately 2 months. These collars are 24" long and are meant to be cut to fit your dog. Follow the instructions on the packaging, or reach out to us for help!