Chin to eyebrows: A minimum distance of more than 3.1 inches measured between the center of the chin and the upper edge of the eyebrows with the mouth remaining completely closed. Eye to eye: A minimum distance of 2.5 inches (6.5 cm), measured between the outer corners of the eyes.

The POTOMAC Emergency Escape Mask is suitable for most faces. It is estimated that 80% of the population and over 97% of adults have facial dimensions consistent with the POTOMAC mask. Generally, the mask fits children who are 10 years and older.

Warning:
Persons who do not meet both of the following minimum measurements must not use the POTOMAC Emergency Escape Mask, because the mask will not fit or function properly on such a person. Failure to follow this warning can lead to serious injury or death.