This document has been produced by the convenors of CEN/TC158 working groups. It is intended to serve as a guide, to be consulted when drafting new EN standards for head protection and when revising or amending existing ones. Whilst implementation of its contents is not mandatory, working groups are urged not to make deviations from this guidance document without good cause.This is a living document - omissions will be covered in later issues.In this document, reference is made FprCEN/TR 16148, Head and neck impact, burn and noise injury criteria. This gives further guidance about the areas of the head which helmet standards should aim to protect, and about