HEAD COLLAR FOR DOGS- Head halter for dog's head and mouth; provides gentle control over dog's movements, headcollar does not cause choking and is painless for dog. STOP PULLING INSTANTLY- It works like a halter on a horse-where the nose goes,the body will follow. Pressure is applied to the back of the neck (rather thanthe front) reducing your dog's drive to pull forward. COMFORTABLE, SOFT & FLEXIBLE- Made of soft nylon webbing, it is easily adjustable, flexible and comfortable for pet, It does not cause choking and is designed to let your dog drink or pant conveniently. EASY TO USE- Includes an easy-to-follow fitting instructions and an abbreviated training guide. LIFETIME WARRANTY- Product comes with hassle-free Barkless Lifetime Warranty against manufacturer defects or failure to meet customer satisfaction; We highly recommend measuring your dog's snout circumference before purchase, you can find our size guide from picture and description, or if you have problem with the sizing you are welcome to contact us