|First Appearance||Ben 10 Returns: Part 1|
ID Masks can change someone's appearance into a completely different one.
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.
The image produced by the ID Masks can be momentarily disrupted by flashes of lightning.
|Mutant Kevin||Normal Kevin|
- In Alien Force and Ultimate Alien, the ID Masks glow blue when used but in Omniverse, they glow green.