Supermax (short for: super-maximum security) is a primarily U.S. English term used to describe "control - unit '' prisons, or units within prisons, which represent the most secure levels of custody in the prison systems of certain countries. The objective is to provide long - term, segregated housing for inmates classified as the highest security risks in the prison system -- the "worst of the worst '' criminals -- and those who pose a threat to both national and global security.
what is the main purpose of the supermax prison ​
to provide long - term, segregated housing for inmates classified as the highest security risks in the prison system -- the "worst of the worst '' criminals -- and those who pose a threat to both national and global security