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. They are used by Sentinel Services and Trask Industries in mutant detention centers, prisons and labs.
- 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.