KN95 masks from Nan Qi Xing offer multilayer protection. The adjustable nose bridge and elastic ear loop have enough elasticity to make a good seal. 3D three-dimensional design with fluffy, breathable, and soft material will not cause the fog when wearing glasses. 5 layers, Made from non-woven fabric, moisture resistant, non-irritating. Listed on the FDA Appendix A list Tested by an ISO 17025 credited lab Elastic straps and adjustable nose clip for different face shapes and sizes Protects you from airborne particulates and pollution Designed for 95 percent filtration, provides anti-dust protection Made of high-quality material, safe, soft, and comfortable Five (5) layers of filtration Contains a metal strip that forms to your nose for a better fit Elastic ear straps hold masks in place comfortably Folds flat for easy storage They tested a limited number of masks from this manufacturer and found that the filtration efficiency was above 95 percent. See the website for a copy of the testing report. This product is included on the EUA Emergency Use Authorization List. Multi-layered protection against dust, particles, and droplets. Filter efficiency 99.3 percent to 97.19 percent Flexible elastic ear loops. Compact design, easily disposable. Adjustable nose bridge for a comfortable fit. Get you and your family their protective gear on and walk comfortably with a EUA Approved KN95 face mask. Ships from our Houston or NY warehouse. Transit time 2 of 3 days with most ordered shipped the same day via USPS first class mail. Masks are delivered via USPS envelop so be sure to check your mailbox.