A more thorough explanation:

Prisoners' rights refer to the legal protections and standards of living afforded to individuals who are incarcerated in federal or state prisons. While prisoners do not have full constitutional rights, they are protected by the Eighth Amendment's prohibition against cruel and unusual punishment. This means that prisoners must be provided with a minimum standard of living, and they cannot be subjected to inhumane treatment.

For example, in Brown v. Plata, the Supreme Court upheld a court-mandated population limit to curb overpopulation which violated the Eighth Amendment in California prisons. Additionally, prisoners retain some constitutional rights, such as due process in their right to administrative appeals and a right of access to the parole process. They also have rights to speech and religion, to the extent these rights do not interfere with their status as inmates.

Prisoners are protected against unequal treatment on the basis of race, sex, and creed by the Equal Protection Clause of the Fourteenth Amendment. The Americans with Disabilities Act (ADA) also applies to protect prisoners with disabilities, guaranteeing reasonable accommodations. The Prison Litigation Reform Act (PLRA) requires prisoners to exhaust administrative remedies before challenging a condition of their confinement in court.

Courts tend to defer to prison officials regarding prisoners' rights. When prison regulations infringe on an inmate's constitutional rights, the courts use the rational basis test to determine whether the infringement may stand.

Overall, prisoners' rights are important to ensure that individuals who are incarcerated are treated humanely and with dignity, while also maintaining the safety and security of the prison system.