Breathing Masks A Color:Gray and mouth areas can be

and mouth areas can be selectively opened

It is safe

25mm latex fits the face better

low air resistance design: using advanced airflow optimization technology to ensure large ventilation volume and low air resistance

Breathing Masks A Color:Gray and mouth areas can beProduct Description Diverse and fun ways to play, 5 endless ways to experience 1. Negative pressure breathing bottle play 2. Breathing bag (3L) play 3. Adjustable flow air port play 4. Visual deprivation play 5. Smell Box. 1. Negative pressure breathing bottle play. Replace the traditional negative pressure bottle with a multi function bottle cap design, even if you go out without a negative pressure bottle, you can still play with negative pressure!