The use of this face covering is not a guarantee against infection or the transmission of viruses or diseases.  Neck Gaiters are not FDA or CDC approved PPE and are for personal use only.
The CDC recommends wearing cloth face coverings in public settings where other social distancing measures are difficult to maintain to help slow the spread of COVID-19. Our seamless tubular face coverings are not manufactured to and do not prevent bacteria or viruses.
Cloth face coverings should not be placed on young children under age 2, anyone who has trouble breathing, or is unconscious, incapacitated or otherwise unable to remove the mask without assistance.
The cloth face coverings recommended are not surgical masks or N-95 respirators. Those are critical supplies that must continue to be reserved for healthcare workers and other medical first responders, as recommended by current CDC guidance.

https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover-faq.html
https://www.cdc.gov/coronavirus/2019-ncov/hcp/ppe-strategy/face-masks.html
https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/how-to-wear-cloth-face-coverings.html