Our FFP2 Face Masks meet the WHO guidelines of filtering at least 94% of particles when inhaling with a leakage of 8% or less offering strong protection against airborne diseases. Each mask is made up of four different layers for maximum protection. The nose and ear fittings have been chosen to be both effective and comfortable so the wearer can go about their daily work with minimum disruption. Those wearing glasses and/or visors will also note that the foam strip prevents their eyewear from fogging up.