Mutant Inhibitor Collars are devices created by Trask Industries. Their purpose is to prevent mutants from using their powers. While being worn, the collars sense the X-Gene, and if a mutant tries to use their abilities, it sends out a painful shock that can cause nosebleeds. The collars can be turned on and off remotely. They are used by Sentinel Services, law enforcement and Trask Industries.
- Porcelain Mutant
Stronger mutants, especially those experiencing high emotions, are able to use their powers despite wearing the collar - albeit by exerting themselves through the pain. This was demonstrated by Polaris in rX.