Time should be taken when accustoming a dog to the Halti OptiFit, so that he has a positive association with it. Initially place the noseband flat in your hand and feed the dog treats, so that he is happily putting his nose through it. When he becomes used to it you can secure the neck section, so it is snug, but not too tight.
To ensure that he cannot pull the nose band back over his nose, slide the camlock towards his chin and lock. However, it is important that the camlock is not so high that it restricts his ability to pant, eat or to open his mouth.
When first using the Halti OptiFit, ensure you continually praise and reward your dog and feed treats, to help distract him and ensure it is a rewarding experience. Never leave the Halti OptiFit on an unsupervised dog.