Ben 10 Things

A mask is an object worn to cover the face. They can be just small enough to cover the eyes or the entire face. A person normally wears a mask to attempt to hide their identity.

The Omnitrix is a device that allows the user to transform into different alien beings.

A costume worn by vigilante crime fighters, it's main functions are concealing the true identity of it's wearer and intimidating criminals.

An upgraded version of the Omnitrix. It not only allows the user to transforms into different alien species, it can evolve them into their ultimate forms.