Adaptil Collar is convenient and easy to use. Diffuses the pheromone canine appeasement steadily (even when the dog is outside). The body temperature of the dog and the leash close contact heat and promotes the diffusion of the pheromone into the surrounding environment. It is essential that Adaptil Collar is in close contact with the dog's skin at all times. Adaptil Collar is ideal for: - Socialization of the dog. - Trips (for dogs who travel frequently or for long trips and / or going to new destinations such as vacation, or a new house, etc.). - Stay in kennel / hotel canine / protective. - training programs. - noisy events (storms or fireworks), especially for dogs who live mostly outdoors (outside) and can not be kept at home for these events to be alone at home (especially for outdoor dogs). two sizes of adjustable collars are available: - dogs / small dogs (adjustable necks up to 37.5 cm) - medium / large sized dogs (adjustable necks to 62.5 cm) Each collar lasts up to 4 weeks. It can be replaced when necessary. How do I Adaptil® leash? 1 - Place a finger in the plastic loop located inside the collar near the buckle. 2 - Using this loop, pull the thin plastic to unwind the leash. 3 - Tighten the collar. 4 - Put through your dog's head. Loosely fasten around the dog's neck. 5 - Tighten the collar to fit comfortably and contact with the skin of your dog. 6 - You should be able to place no more than two fingers between the collar and the dog's skin. 7 - Make sure the collar is attached to the buckle. 8 - Cut the excess portion of the collar. Note on dogs: as the puppy grows, it is important to regularly check the fit of the collar, to make sure it is not too tight. It is proven that Adaptil Collar works in all breeds of dogs, since it placed properly. The pheromone canine appeasement is released almost immediately. The collar does not work when it's wet, but again spreads pheromone soon as it is dry. If your dog uses another collar is important to ensure that Adaptil Collar stays in contact with skin. Please note that Adaptil Collar can not be used to apply a leash. Do not use the leash in dogs with extensive skin lesions. Do not open the protective bag until you are ready to use the product.