3 ply IIR is designed to help provide respiratory protection for the wearer. These pleat-style masks have a filter efficiency level of 99% or greater against particulate aerosols, preventing the exhalation of airborne viruses and the spread of respiratory droplets from an asymptomatic carrier. FOB in Italy. Our face masks have 3 layers of ptotection: top and bottom layers are made from spun-bonded polypropylene and non-woven fabric. The middle layer is polyropylene melt-brown, non-woven fabric. These masks offer 99% BFE and also include glass free fibre with no latex, are lightweight and breathable, has prevention of harmful particals entering the body and a comfortable fit.