With 4 layers non woven fitting user face:
+ Outer material: PP Spun-bond non-woven fabric
+ Filter layer: PP Melt Blown non-woven fabric
+ Antibacterial Fabrics: High-class antibacterial non-woven fabrics, water proof, preventing bacteria from outside environment
+ Inner material: PP Spun-bond non-woven fabric, soft and high quality for ng with skin.