Military dogs wear a variety of collars depending on their purpose. Working military dogs often wear extremely high-quality dog collars that are made with the most durable nylon or leather, depending on their environment and mission. They’re designed to be not just durable, but also comfortable and practical for extended periods of use. For instance, if a military dog mostly works in wet conditions, the best option would be a nylon collar. Meanwhile, a leather collar can be a good choice in dry conditions.