LIBREMASK

LibreMask is intended to be an ICU grade mask that uses breathing filters, HMEs and HMEFs filters in order to achieve a filtering efficiency superior to N95 or FFP2 masks... Libremask design consists of a mask made by hot press molding or mold injection with silicone or santoprene, removing the caveats of 3D printed materials, and a standard breathing filter, available in hospitals. These filters offer filtering efficiencies greater than N95/FFP2 masks, shielding the most penetrating aerosol size - 300nm - in comparison to surgical masks that offer shielding to micron-sized aerosol. These filters even outperform conventional N95/FFP2 masks as reported by the manufacturers [1], and by non-standard aerosol filtration tests described below... LibreMask aerosol leakage tests in clean room with laser illumination and high speed camera recording, in IAVANTE (Junta de Andalucía). LibreMask offered better performance than FFP3 masks with exhalation valve