TOTOBOBO ANTI POLLUTION MASK 96% FILTER (10 PAIRS) Top protection! High efficient, low resistance filter with sub-micron filtration performance. Packed in sealed zip lock bag. Extra high level of protection while being easier to breath than typical N95 filter. Contains electro-static charges and is highly effective to trap fine dusts and particles even below 0.3 micron. The filtration efficiency is at least 96%. This is our highest performance filter and is also suitable for blocking airborne pathogens such as virus and bacteria.