Anti-allergic Ultrasonic seam Soft nose Barrett Latex and fiberglass free Single use only Packing: 50 pcs/box, 2.000 pcs/carton 3-PLY DISPOSABLE FACE MASK STRUCTURE 1st Layer: Water-repelling, non-woven fabric. Prevents droplet and spray penetration. 2nd Layer: Electrostatic-induced melt-blown polypropylene, blocks dust and microbes (>99%). 3rd Layer: Fine bicomponent (PP/PE) fabric, absorbs moisture and provides soft and non-sticky feel.