A FIRST IN THE WORLD! With the 4+4 Layer, you can protect yourself from viruses without the need for a double mask. It has been scientifically proven to destroy viruses in 7 minutes with the silver ion layer it contains. Hippocratic Mask technology and its R&D Process, which started in 2014, is a T�¼bitak R&D Project that provides maximum protection against viruses and bacteria, developed with the NanoParticle technology of the Silver ion technology Biopolymer Kit. Hippocrates mask has achieved 99% success on the research, behind this success is nanoparticle technology produced with 2 layers melt blow 2 layers spun-bond 0.1nm silver ion polymer kitin.