Composed of 2 velcros, and strap in slightly stretchy material. Once adjusted, with the velcro over the head, you can put the chin strap on and tighten it at the back. Over the course of the tests, you will be able to adjust it between acceptable comfort and a tight enough fit to keep the mouth closed. Why an anti-snoring chin strap? The chin strap keeps the mouth closed during the night. Thus, breathing takes place through the nose. Snoring is therefore greatly reduced. On the other hand, the nose, for this to work, must be well uncorked. To do this, you can use a nasal spray and a nasal spreader . The test To get used to the chin…