Sustainable Open-Cell Foam Adapted for COVID-19 As Proven & Used by the US Military Since 2002 The BioShield™ Mask substantially mitigates the risk of infection from airborne pathogens and the risk of you infecting others. The BioShield™ Mask provides 22 square feet of surface area while the typical cloth shield provides .58 square feet of surface area. BioShield Facts: At 38X the surface area of cloth mask, the BioShield™ mask significantly increases the probability that airborne pathogens will be blocked and/or trapped in the high surface area Open-C...