Melt-blown PP Non-woven 25g affinity layer + Melt-blown PP Non-woven 25g filter layer + Spunbonded PP Non-woven 25g affinity layer EN14683:2014 Type IIR ASTM Performance level : Level 2 Bacterial Filtration Efficiency: >98% Particle Filtration Efficiency: >98% @ 0.1 micron TGA approved - ARTG 333627 Material Composition: Straps PP Non Woven Elastomer Nose Clip Aluminium Inner (PP Spunbonded), Middle (PP Melt blown Non Woven fabric) Outer (PP Melt blown Non Woven Fabric) Approximate weight of product: 2.5g