Good Behavior Pheromone: Calming collar for dogs uses advanced pheromone technology that mimics the pheromones released by the mother and activated and released through body temperature. Pets respond to pheromones throughout their lives, which mimics the natural way pets deal with anxiety and stress. So calming dog collar is a safe and effective way to help dogs relieve anxiety and stress. Long-Lasting Calming 60 Days: Puppy calming collars can start working quickly within 1 hour and continue to release pheromones for up to 60 days, providing your dog with superior and longer-lasting pheromone delivery to help your dog relax. And the pheromone collar is waterproof, so your dog don't need to take off the collar when you take a shower or play in the rain. Quickly Improve Bad Behavior: Calming dog collars can quickly and effectively relieve fear or stress caused by heat, noise, traffic, travel, veterinary visits, pet loneliness, fireworks, thunderstorms, separation anxiety, etc. The resulting barking, destructive chewing, and other undesirable behaviors, helps dogs adapt to challenging environments, let the dog relax and calm down. Kindly Tips & Excellent Service: Since each anxiety collar for dogs is individually packaged, if you are sensitive to odors, you can open the package 1 hour before use, put it in a ventilated place, and then use it. We are committed to providing our customers with the highest quality products and services.