Spartans Unique Design principle is Over Engineering / Overkill is Better Filtration! Based on a similar Design as the n95 filters layering approach of filtering standards like shown above with an additional dual layers of high thread count breathable cotton fabric sewn around a padded nose guard ties behind the head for full contact of filter with face; improvement over conventional face masks that pull on the ears; can be worn for hours comfortably! The Filter & Other materials used make Spartan Face Mask Filters easy to wash & sterilize between uses! With the addition of a unique biocide spray safe for skin / breathing provides an Extra element of prevention of Droplet & or potentially the Virus itself. As with Every PPE (Personal Protection Equipment both for Medical or Personal use; results depend largely on other steps like Washing Hands Staying Indoors / At home, Not touching face when out for essentials (Spartan Masks prevent you from being able to touch your face will after you’ve decontaminated yourself & washed hands Social Distancing & Use of high quality / strength hand sanitizer we believe giving your nose mouth & lungs a fighting chance let alone not transmitting the Virus to others or ending up on a ventilator, Spartan Face Masks & Shields might help improve your odds!