Masks are costume accessories, which are used in theatre performances and a great number of rituals in order to disguise the face and lend different character to those, who wear them. The here presented pieces do not correspond to the original function of masks. This is due to the reflecting materials they are made of and to the fact that their both sides are identical. The viewers in front of the masks cannot look at and perceive the changed character of the disguised ones; the only thing that they can see is their own reflection. The disguised people behind the masks, on the other hand, are practically „unmasked”, because they also see themselves in the reflecting surface. Thus, these masks play the role of barriers, which isolate the people in front from those behind, making their communication impossible.