Play tough with the protection you need in the bauer 5100 helmet the triple density liner helps to disperse impacts on contact and tool free adjustment enables proper fit for enhanced protectionexperts state that concussions are mainly due to acceleration or deceleration of the brain and helmets may not prevent concussions caused by these forcesgame day protectiontriple density liner hx sorb mid density comfort foamergo translucent ear coverscustomized fitthree distinct shell sizes s