The CalmDown by KRUUSE® Post-Op Button comforts cats and has a soothing effect because it mimics the natural comforting pheromones that a mother cat produces to soothe her kittens. The button contains a scientifically tested pheromone that helps soothe cats in stressful situations. It is non-invasive, easy to use and works for at least 10 days. The button is suitable for cats of all ages. Insert the pheromone-based button into the holes to help the cat feel safe, comfortable, and relaxed.