•Available in various protection levels:3PLY: Basic protection against dust, droplets, and larger particles.4PLY: Enhanced protection with an additional filter layer.KF99/KN99: High-efficiency filtration, blocking at least 95% of particles 0.3 microns or smaller.
•Antiviral Copper Oxide: Treated with copper oxide, which has shown potential to inactivate viruses and bacteria (effectiveness may vary).