Helmet

Abstract

A helmet comprising an energy absorbing layer, a relatively hard layer that is harder than the energy absorbing layer and is formed outward of the energy absorbing layer and a plurality of outer plates mounted on the outer surface of the relatively hard layer; wherein the outer plates are mounted on the relatively hard layer such that, under an impact to an outer plate, the outer plate can slide across the relatively hard layer and move relative to other outer plates; and a low friction interface is provided between the outer surface of the relatively hard layer and at least a part of the surface of the outer plates that is in contact with the outer surface of the relatively hard layer under an impact to an outer plate.