Filtration efficiency >95%. Non medical grade. Odorless. Premium 5 layer filter membrane design provides ultimate protection while allowing air flow and breathability for healthy breathing and longer comfort. Soft flat fold design with contour molded comfort provides a close fit to reduce inward air leaks of pollutants. Quick and easy to put on. Face piece is naturally contoured without pressure points with a molded nose bridge providing an easy and comfortable seal and fit. Straps are securely attached to maintain a good seal.