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.

Fit could be improved Masks are pretty good and reasonably comfortable, but it would be nice if the ear loops were easily adjustable. I have to tie loops in order to tighten them appropriately; as is the mask does not form a seal and so cannot possibly perform like an N95.

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.

The new masks arrived in very timely… The new masks arrived in very timely manner.

DESAVO masks First time trying the DESAVO version. My husband & I really like these! Will be getting more. Covers better than any other masks we have tried.