The Petsafe Premier Gentle Leader Medium Dog Headcollar offers immediate control over pulling on the leash. By gently steering your dog's nose you can guide their body without causing discomfort to their throat. This black collar does not choke and applies pressure at the back of the neck instead of the front. It allows your dog to open its mouth to eat, drink, pant, fetch, and bark. Suitable for dogs 8 weeks and older, it can be worn for up to 18 hours a day. Comes with easy-to-follow instructions, a training guide, and a comprehensive training DVD.