These KN95 Respirator Masks protect the wearer from up to 95% of particles of upto 0.3 microns. Provide bacteria filtration efficiency (BFE) and particle filtration efficiency (PFE). These unisex folding style masks are made from 100 percent fabric with a 5 layer construction and have an additional air filter. \r\nIn terms of comfort, they feature a self-priming filter and offer two-way protection, which means that they help filter both inflow and outflow of air.\r\nThe loop ear-straps are soft and flexible for a secure fit, whilst the flexible edges and adjustable, concealed aluminium nose clip adapts to the shape and curves of your face to prevent gaps.\r\n \r\nKN95 respirator masks fit snuggly unlike normal masks which are loose fitting providing a more comfortable fit and more effective protection.