Halter's / Head collars work in a different way than Harness and collars.
A Halter will help train your Dog not to pull and control there Head. It also has a calming affect on your Dog, where it lays over the nose is a calming pressure point for dogs and other animals like Horse's. It is the area as young Puppies or foals the mother will cover or rub to calm there young.
In using a head halter you are giving those calming signals to your dog,
Our All in 1 webbing Halters have a wide band to give a maximum calming affect for your dog.
When using the Halter use plenty of positive reward based training in praise and food rewards for them.