The Beaphar Calming Collar for cats is a stress-relief product designed to reduce problem behaviors like excessive meowing, scratching, and scent-marking by slowly releasing natural calming agents, primarily valerian and lavender. It is suitable for cats of all ages and breeds and is effective for up to 3-4 weeks. The collar includes a safety mechanism to prevent injury if it gets caught, making it suitable for stressful situations like travel, moving, or the introduction of new pets or changes in the household.