The MILWAUKEE® BOLT™ IMPACT ARMOR™ liner provides you with advanced slip, trip & fall protection on the jobsite. Injuries from slips, trips, and falls are some of the most common and can result in oblique impact forces being passed to the brain. These oblique impacts can cause Traumatic Brain Injuries (TBIs). The BOLT™ IMPACT ARMOR™ liner delivers the best oblique impact protection† to help protect the brain (through RHEON™ technology). This Liner is fully compatible with all Milwaukee Tool Type 2 Safety Helmets. It has both anti-microbial and moisture-wicking properties and is machine washable. †Based on impacts at a 45° angle at a speed of 6.5 M/s averaged across 16 testing locations around the full helmet circumference.