text: We have employed a proprietary fabric and filters in our masks that ensure ease of breathing. Some masks need exhale valves because it is difficult to pull air through and so humidity quickly builds up and needs to be released when exhaling. This provides a problem if the purpose of the mask is to protect those around you from your germs since you are releasing them through the exhale valve whereas with O2SafeAir you are breathing in and out through the filter.
  O2Health is a surgical style 3 ply mask that meets the GB/T 32610-2016 standard for technical specifications of daily protective masks. Materials consists of a combination of meltblown and nonwoven filter layers that have over 95% filtration efficiency and are pleated for more surface area and easier breathing.
  The main purpose of the mask is for use as a source control to prevent spreading of the users respiratory droplets which could contain cold or influenza virus particles. When effective grade nonwoven 3 ply masks are worn, your mask protects others around you and others wearing nonwoven 3 ply masks can protect you from their mouth-borne germs.