The Non-valve and PRO masks have the same filtration technology, and therefore provide the same filtration efficiency. The filters of our masks have been thoroughly tested by Nelson Labs, which is a US-based global leader in the field of lab testing. Our masks have the viral filtration efficiency of 99.6%, a bacterial filtration efficiency of 99.7%, and an average particulate filtration efficiency of 99.7% down to 0.3 microns.
You can learn more about our Filtration Technology here.
If you have further questions, please contact us by email at info@cambridgemask.com or Chat button on our sites to connect with our Customer Service Team.
