I believe that multiple layers of fabric are better than only one. More layers means less chance that viral particles will be able to pass through. Also, as a general rule, thicker, denser fabrics will do a better job than thinner, and this mask encompasses 3 layers, making it that much more effective than a simple cotton bandana.There are better masks available but they are very expensive and only come in small quantities. This mask is just as effective as the expensive ones but you get a large quantity and for anoutstanding price.This 3-layer mask fully covers your nose and mouth while grabbing onto the bottom of your chin like an anchor. It iseasily adjustable to all face sizes and fits comfortably withoutinterfering with breathing or fogging up ones spectacles.I would, therefore, recommend this non-medical mask to everyone for its price and its value.