During an impact, the shell can shift back and forth, absorbing and redirecting forces that would otherwise go to the brain. The sliding movement on the shell decreases rotational forces about the brain, reducing the risk of rotational brain injury. A MIPS helmet makes use of a Multi-directional Impact Protection https://holdenyurld.eedblog.com/40032158/the-2-minute-rule-for-wolverine-motorcycle-helmet