ID Mask

ID Masks are a type of alien technology used to hide the wearer's true identity, allowing them to take on another appearance. They were first seen being used by the DNAliens.

Usage
ID Masks can change someone's appearance into a completely different one.

ID Masks make their first appearance in Ben 10 Returns: Part 1 where DNAliens use them to take the forms of various Human beings. Ben used one to turn into a DNAlien to sneak through their ship.

Max Tennyson used an ID Mask to be invisible, which shows that they also can be useful for camouflage.

Kevin used an ID Mask to hide his hideous form and look like himself. He is able to fix broken ID Masks.

ID Masks are used by Plumbers' Kids who are obviously part-alien to hide their appearance and be able to roam freely on Earth.

ID Masks can also be used to copy objects, as seen in Greetings from Techadon, when Ben thought to use Kevin's ID Mask to copy the Ultimatrix symbol and placed it onto Vulkanus' back so that the Techadon Robots would attack him instead of Ben.

Weaknesses
The image produced by the ID Masks can be momentarily disrupted by flashes of lightning.

Trivia

 * In Alien Force and Ultimate Alien, the ID Masks glow blue when used but in Omniverse, they glow green.