90% Efficiency Rate 0.3um Naci 90% Efficiency Rate Filter Media Pm2.5 Filter 60% Efficiency Rate 90 0.3um Filter Efficiency PM2.5 Tc 90/10 Good Drape And Low Shrinkage Rate 90 Polyester 10 Cotton Double Face 90% Wool 90/10 Pocketing Fabric 90%polyester 10%elastane