Do you know not all face masks are ASTM-rated? It’s important to check before you choose. Simply look for ASTM Level 1, 2, or 3 on the face mask package. It’s worth the effort to find face masks that DO carry the ASTM rating, to be sure you’re getting the proper level of protection. Dental Mates supply this highest ASTM level 3 medical/surgical masks, higher level means more protection.