US FDA Registered and Korea FDA Approved. KF94 Grade Certified Premium Mask Made in South Korea | INDIVIDUAL PACKING IN 20 PACK CASE – Easy to carry and hygienic | EXCELLENT FILTER EFFICIENCY – Maximum 99.94% and minimum 99.85%, tested by National Personal Protective Technology Laboratory (NPPTL) | ERGONOMIC 3D DESIGN – Fits around the contours of your face giving a comfortable feel and excellent breath-ability while wearing all day. | SOFT & LIGHT WEIGHT PREMIUM NONWOVEN FABRIC – 4 layers including MELTBLOWN filter