All the cloth masks and materials had near zero efficiency at 0.3 µm, a particle size that easily penetrates into the lung (SARS-CoV-2 is 0.05 µm)
The cloth that serves as the filtration for the mask is meant to trap particles being breathed in and out. But it also serves as a barrier to air movement because it forces the air to take the path of least resistance, resulting in the aerosols going in and out at the sides of the mask. Conclusion: Wearing masks (other than N95) will not be effective at preventing SARS-CoV-2 transmission, whether worn as source control or as PPE. although n95 masks don't stop air from coming in around the nose and mouth making them pointless ID the masks doesn't seal to your face around your nose and mouth it doesn't stop anything plus n95 masks have a flap allowing the exhale to come out to reduce moisture and make it easier to breathe so even sealing them around your nose and mouth won't stop the exhale of the virus POINT IS WEARING A MASK OTHER THEN THE ONES THAT SEAL COMPLETELY AROUND YOUR MOUTH AND NOSE WON'T DO THE VIRUS SO DON'T THINK YOUR SAFE BEING AROUND SOMEONE THAT IS RUNNING A FEVER COUGHING SNEEZING BECAUSE YOU WILL STILL GET THE VIRUS ONLY TIME YOUR SAFE IS WHEN YOUR AROUND SOMEONE THAT US A SYMPTOMATIC OR NOT A CARRIER AND YOU WILL MOST LIKELY ONLY GET THE VIRUS NY TOUCHING THINGS AND DOING YOUR NORMAL FINGER SUCKING AND NOSE PICKING