The KN95 Surgical Medical Masks are made of strong but lightweight breathable full mesh nylon material. It has 95% filtration of particles >0.3 microns in size.
KN95 masks are produced in very clean, almost dust-free production environments. Approved by FDA and listed on FDA EUA list.
The KN95 masks comply with standard GB 2626-2006 (KN95 grade), The performance is tested on four sections:
1) The Filtering efficiency, is over >95%
Tested using NACL as the particulates, the flow is: 85L/minute, the density of particulates: 15mg per CBM, at regulated temperature range, and at regulated humidity range
2) The resistance to inhaling (air in): must be less than 350 Pa
3) The resistance to exhale (air out): must be less than 250 Pa
4) The quality of earloop/headband straps: pulling force of 10N lasting for 10 seconds, must be OK, cannot break