Each group has its own set of masks used for various reasons.

There are a wide variety of masks used in Africa.

For those that need to hide their identity they use masks.

The researchers used a simple hat and masks to test the animals' abilities.

The masks used are usually fierce looking and their interpretation is only fully understood by the society's members.

Many will see it as little more than a mask used by certain economic elites for taking away the voice of the individual citizen.

Thomson plays all of the roles, using masks to change character.

Mask dance's called because the dancers use masks when dancing.

It is called mask dance because the dancers use masks when dancing.

In that play and film, Thomson plays all of the roles, using masks to change character.