Just put it on your mouth and go to sleep without any effort? Nose Breathing "Nerneru
Nerneru" is a convenient item that leads you to nose breathing effortlessly just by putting it on your mouth and sleeping. It is said to be hygienic and disposable.
There are probably quite a few people who wake up in the morning with a scratchy throat or are bothered by gargling during sleep, and a product is now on the market that is recommended for such people.
Just by putting it on your mouth and going to sleep, it will help you breathe through your nose. Nerneru" is a convenient item that helps you breathe through your nose without difficulty just by putting it on your mouth and sleeping. It is said to be sanitary and disposable.

Patent pending and apparently recommended by Takeyuki Ikematsu Snoring Research Institute
I am not sure if you can sleep soundly with this product on your mouth or not, but I can feel that you may be forced to breathe through your nose.
Nerneru is scheduled to go on sale July 1 in the Cecile catalog and online store.