Answer:
Face Form
Step-by-step explanation:
A face form is used for storing a mask for greater than 30 days. The main role of face foam is to maintain the shape of the mask
M- 50 FPM is used to provide 24 hours protection against chemical , radioactive effects and also from biological agents. IT has several accessories out of which face form is one which is used only when mask is to preserved for a long period of time.