Prosthetics is defined as an item that is applied to the body, to enhance its appearance. The term also applies to appliances and masks. Its uses are not always limited to the face, but also other body parts. It is not unusual to hear about a full-body appliance, as in the case with some movies made today.
Again, the warning with allergies to latex applies here.
Latex Mask Central on how to protect your mask against degradation - http://www.latexmaskcentral.com/MaskDoctor.php