Latex mask is generally refered to a full-head enclosure or disguise, often worn by someone as a part of a costume and usually made from natural latex rubber, though some masks can be made of vinyl, silicone rubber or foam latex.
The Latex Masks are one of the most important items of the Mission: Impossible Cinematic Universe.
Most of the team members were masters of disguise, able to impersonate someone connected to the target or sometimes even the target himself.
This was accomplished with realistic latex face masks and make-up. Some impersonations were done with the explicit cooperation of the one being impersonated. Also bona fides would be arranged to aid infiltrating the target organization. Sometimes one or more IMF team members would allow themselves to be captured in order to gain more access to or knowledge of the organization they are infiltrating, either by conversing with the target or being held in a jail cell and hatching their plan there.