The Mask in dreams.
In dreams, the things that hide the face or part of it, such as a sweatshirt with a hat or a mask, imply that we are hiding something,
since they are an obstacle to being able
to clearly appreciate someone's face.
But if we see someone we know with a mask and someone takes it off, it means we will discover what that person was hiding.
The same if we dream that we are in a betting duel (A fight between two masked fighters, where the loser must take off the mask and show his face) and win the contest, removing the mask to the opponent. Unless we dream with a mask with the shape of an animal or something in particular, since then, who wears the mask is assuming the qualities or defects of the animal or thing in particular.