How often does the face mask change?
Medical experts recommend that masks should be replaced in a timely manner after being used for 4 hours, otherwise virus will gather on the surface of the mask and eventually contaminate the mask.
10 PCS for 5-6 days use, 20 PCS for 10-12 days use, 50 PCS for 1 months use, 100 PCS for 2 months use, 200 PCS Suitable for home, 500 PCS Suitable for business.
★ The difference between N95 and KN95 masks is just the name. They both represent a type of mask with a filtration efficiency of 95% or more in the air.
From Wikipedia: The filtration efficiency of KN95 is equivalent to N95, so KN95 masks and N95 masks can replace each other.
N95 Safety Face Mask | NIOSH Approved - the safety masks are approved and certified by the National Institute for Occupational Safety and Health | 95% Filtration Efficiency
6-Layer design | High-density non-woven fabric-nano filtration-N95 filtration-high-breathable non-woven fabric, the N95 Safety Mask can protect you from virus, dust, car exhaust, pollen, etc
Lightweight Design | Soft Comfort Foam | Adjustable Nose Clip | Adjustable Elastic Straps,the N95 Safety Mask create a secure seal for maximum protection
3D Ear Hanging and Lightweight Design make your breathing easier. High-quality Elastic Straps make it comfortable to wear for a long time, suitable for home and professional use, indoor or outdoor use