ASTM F2100-11 Level 3Halyard Health FLUIDSHIELD* masks have long been considered the industry standard. Our new FLUIDSHIELD* Level 3 masks now meet the ASTM F2100-11 Level 3 standard. Designed to provide high fluid resistance, FLUIDSHIELD* Level 3 masks are available as either surgical masks with ties or procedure masks with earloops and include a wraparound visor for added protection.