Surgical face mask Special - antibacterial Surgical antibacterial facemask, 3-layer, highly efficient, with a plastic strip integrated for its perfect anatomical adjustment. Its BFE (bacterial filtration efficiency) is more than 99,6% and its good breathability (�±16,88 Pa) makes it possible to breath comfortably during long periods of usage. Our face mask is composed of fine nonirritable material, without odour, sensible to the skin. It does not contain latex, glass fibers or other allergens. The antibacterial filter (non woven meltblown PP â?? the inner layer) with active silver particles is covered on both sides with non woven spunbond PP. The high antimicrobial efficiency is made possible thanks to its active component ANSILVER (active silver particles) which is activated only in a humid environment, that is, in contact with nose and mouth. The particles caught (viruses and bacteria) die or become inactive, unable to reproduce themselves. ANSILVER does not volatilize nor ever after long periods of storage. It remains stable in dry environment.