Integrum Medical Masks ASTM Level 3 Mask 4-Ply Integrum Medical Masks Product Features 4 Layers Of Protection Conforms to ASTM Level 3 Standards Comfortable Design - prevents dust and fits to face Bacteria Filter Efficiency - 99% Elastic Straps - ensures comfortable and tight fit Disposable - for single use 50 count/box Integrum Medical Masks’ meet ASTM Level 3 testing standards, which means they are the highest level disposable surgical masks available. Typically used in a medical or dental setting, these masks are made of 4 layers of nonwoven melt-blown materials that melt instead of catch fire like regular paper when exposed to heat. In addition, these masks must meet a high level of fluid resistance and also bacterial and particulate filtration. Per ASTM test standards, masks are not tested with viruses but are expected to filter the same amount of viruses that are the same size as bacteria and particulates. ASTM Level 3 Masks are Essential For Proper Safety Protocols These 4-Ply Integrum medical masks keep users safe in settings where there is a high amount of exposure to fluids and/or aerosols. With a fluid-resistant outer layer, the user is more protected while performing procedures. BACTERIAL FILTRATION EFFICIENCY (BFE) ≥ 98% These breathable face masks provide protection for dentists, doctors and other healthcare providers as well as to people needing protection from moderate amounts of spray and fluid. As well as protecting against flu, colds, pollen, dust and other airborne contaminants. 4 Layers of Protection 1st layer:  Non-woven fabric 2SS (30gsm) 2nd layer:  Non-woven fabric 1S (25gsm) 3rd layer:  Melt brown fabric (25gsm) 4th layer:  Non-woven fabric 2S (35gsm) ASTM Levels 1st Level: masks are the general standard for both surgical and procedural use. 2nd Level: moderate barrier protection for low-to-moderate levels of aerosols, sprays and fluids. 3rd Level: