NFPA 1851 is the Standard on Selection, Care, and Maintenance of Protective Ensembles for Structural Fire Fighting and Proximity Fire Fighting as established by NFPA.

The current edition of the standard is NFPA 1851, . The first edition of this standard was introduced in 2001. Previous editions of this standard have not included proximity ensembles or fire fighting helmets. However, the current edition has established standards and procedures pertaining to the entire protective ensemble that will help promote safe fire fighting practices. New guidelines pertaining to helmets include: