KN95 MASK: This product is Manufactured by Dongguan AOXING. It is on CDC NPPTL list with >95% filtration. CE Certified to EN149. See the CDC website for a copy of the testing report. This KN95 mask is NOT a N95 mask, and is an alternative to a N95 mask. For more information about KN95 masks please see the following before you purchase: amazon.com/AboutKN95s. ADULT SIZE - 50 Pack - 5 packs of 10 sealed masks. ADVANCED FILTRATION- Blocks over 95% of particulates - tested by CDC. TIGHT SEAL- Metal nose strap allows for improved seal and fit over standard cloth masks. Mask seamlessly shapes to your face with adjustable ear loops for enhanced comfort without adding strain to the ear.