ASTM F3502-24 PDF

Overview

ASTM F3502-24: Standard Specification for Barrier Face Coverings outlines requirements for the design, performance, testing, labeling, and conformity assessment of barrier face coverings. These coverings are intended to provide source control by reducing the expulsion of aerosols from the wearer and offering a degree of particulate filtration to potentially reduce inhaled aerosols. Developed by ASTM International, this standard sets a nationally recognized foundation for assessing non-medical face coverings used in public and workplace settings.

This specification was created in response to the global COVID-19 pandemic to address a need for standardized performance criteria for face coverings that are neither medical masks nor respirators but still play a role in reducing disease transmission and inhalation of particulate matter.

Key Topics

• Scope and Objective: ASTM F3502-24 applies to both disposable and reusable barrier face coverings designed to cover at least the wearer’s nose and mouth. The standard does not cover medical masks (ASTM F2100) or approved respirators (42 CFR Part 84).
• Design and Fit: Face coverings must meet minimum requirements for facial coverage, fit snugly to reduce gaps, and avoid features such as vents or valves that could compromise source control. Retention systems (like ear loops or headbands) must keep the covering in place during normal use.
• Performance Criteria:
  • Sub-micron Particulate Filtration Efficiency – Face coverings must meet minimum filtration efficiency, indicated as the percentage of sub-micron particles blocked by the material.
  • Airflow Resistance (Breathability) – The standard establishes a maximum airflow resistance to ensure wearer comfort and breathability.
  • Durability and Reuse – For reusable products, effectiveness must be maintained through the specified maximum number of laundering or cleaning cycles.
• Labeling and Documentation: Clear labeling regarding compliance, intended use, care instructions, and limitations is mandatory. Suppliers must provide a Declaration of Conformity to affirm that all requirements have been met.
• Safety Considerations: Materials must be non-irritating, non-toxic, and comply with applicable flammability regulations. The standard excludes claims related to antimicrobial properties or medical efficacy.

Applications

• Public Health Use: Barrier face coverings are recommended for the general population in settings where source control and reduced inhalation of aerosols are needed, such as public transportation, retail, workplaces, and educational institutions.
• Comparative Assessment: By setting standardized minimum requirements, ASTM F3502-24 enables manufacturers, distributors, and consumers to objectively compare the effectiveness and usability of different face covering products.
• Reusable and Disposable Options: The standard covers both single-use and reusable face coverings, accommodating a range of consumer needs and supporting environmental considerations.
• Workplace Safety Programs: Employers can reference ASTM F3502-24 to select barrier face coverings that meet recognized safety and comfort standards for non-medical applications.

Related Standards

When evaluating or specifying barrier face coverings, the following standards are relevant:

• ASTM F2100 – Specification for Performance of Materials Used in Medical Face Masks
• ASTM F3407 – Test Method for Respirator Fit Capability for Negative-Pressure Half-Facepiece Respirators
• ASTM F3050 – Guide for Conformity Assessment of Personal Protective Clothing and Equipment
• 16 CFR Part 1610 – Flammability of Clothing Textiles
• ISO/IEC 17025 – General Requirements for the Competence of Testing and Calibration Laboratories
• NIOSH/CDC TEB-APR-STP-0059 – Determination of Particulate Filter Efficiency

By following the requirements set forth in ASTM F3502-24, manufacturers can provide barrier face coverings that are effective, safe, and reliable for source control and filtration, thus supporting public health and workplace safety initiatives.