| abstract |
A helmet (1) comprising: two layers (2, 3) configured to slide with respect to each other; and wherein the surface of one or both layers comprises a sliding facilitator (4) to improve the sliding capacity between the two layers, characterized in that the sliding facilitator comprises (i) an organic polymer, a polysiloxane and a surfactant; (ii) an organic polymer and a copolymer based on a polysiloxane and an organic polymer; or (iii) a non-elastomeric crosslinked polymer obtained or obtainable by subjecting a polysiloxane and an organic polymer to a crosslinking reaction. |