It is a good mask and provides a better… It is a good mask and provides a better seal around the area covered. It's just more time to get it adjusted properly around the face. As an eyeglass wearer, I do prefer masks that have the elastic around the head and not the ears. The mask also fits a little large for my face.

This mask fits better than most on your… This mask fits better than most on your face. I especially like that it allows you to talk without the mask slipping down your face. The only drawback is that the sides and nose can allow air to enter/exit and if you have glasses it requires a lot of adjustment to prevent fogging. I think if you have a fuller face then that's less of a problem (air getting out around sides and top), but my face is rather thin. Overall it is very comfortable.

Masks used to be sent in individual… Masks used to be sent in individual sleeves. I do not care for all of them in one pack. They stick together and are hard to get out. The individual packaging als allowed for tossing one in school, bag, purse, car...etc.

This mask doesn't fog glasses This mask doesn't fog glasses! As a musician, I need plain black masks for performances but I also wear glasses which can fog up with other masks during concerts. These don't fog my glasses up and are really comfortable. They shipped super quickly too and got here in record time.

COST!!!! COST!!!!! We have to order a months supply at a time. My wife is a severe asthmatic, and cannot NOT use the Chinese made KN95 masks due to air flow restrictions PLUS every time she has attempted to use a Chinese KN95 masks she has immediate skin reaction and immediate sinus infection and restricted airflow. So the Nano Air Mask is the only true protective mask she can use, which estimated cost at current pricing is $1200 per year for her masks alone. Due to being high risk category persons we have to use masks and gloves when out in public, which costs hundreds of dollars to keep supplied and safe. Tough to do when you are on a fixed income and medically not allowed to work any longer. Wife is an RN with Adult onset Asthma, and I'm a Respiratory Care Practitioner both with 40 years experience each.