main features1. The calming cat/dog collar is specially designed for stressed, anxious or aggressive cats/dogs.2. INGREDIENT SAFETY AND EFFECTIVENESS - The Calming Cat Collar contains lavender essential oil to relax cats. Natural ingredients are safe for humans and pets. The collar will start working within 1 hour of wearing.3. LONG LASTING EFFECT - This calming collar for cats will continuously release pheromones for up to 60 days without side effects, effectively preventing cats from exhibiting bad behavior or aggression due to anxiety.4. Comfortable to wear - The cat calming collar is made of high quality TPR material, the maximum size can be adjusted up to 15 inches/38cm, suitable for most cats. Good water resistance allows cats to wear it in the bath, and the soft and elastic texture makes it comfortable for cats to wear.5. Multiple Occasion Use - When your cat experiences thunderstorms, is separated from its owner, travels, is in a noisy environment, or any other situation that may stress it out, wearing the ring can calm it down and prevent excessive meowing Yelling, urinating, or screaming. Scratch furniture.Specification:Material: TPEColor: Purplesize:Cat: length 38cm*width 1cmDog: length 62cm*width 1.3cmPackage includes:Cat/dog calming collar*1 set