The newest addition to the Resistance helmet family, the RES 110 Helmet includes an improved multi-density foam liner. Scientists indicate that brain injuries and concussions are mainly due to linear and rotational accelerations of the brain. No hockey helmet can prevent or eliminate the risk of head injury, including concussions. LINER Multi-density foam liner developed to help manager a variety of impacts ADJUSTMEN Single-tool free adjustment, that allows for an easy alteration at the back of the helmet for a customized fit and high-level comfort. SHELL Designed to maximize protective capabilities and a pro preferred look and shape to help absorb impacts. Small      20\" - 22\" / 21 - 56cm Medium  21.5\" - 23\" / 55 - 59cm Large      22.5\" - 24.5\" / 57 - 62cm