The Beeswift 3 ply masks are for use in all medical, hospital and working environments. The mask earloop fastenings and dual non woven inner and outer layers, complete with non woven filter for combined three layered construction. The 11R masks are individually packed for added protection. Class 1 Medical Device, meeting the essential requirements of the MDD. They are tested and complaint to BS EN 14683 : 2019, Type IIR Filtration > 98%, with added fluid resistance.