This is not a medical grade mask. One size.  Covers from nose to under mouth. This is a very soft fabric, made of cotton TRIPLE PLY WITH A POCKET FOR A FILTER (you do not have to put a filter in but you do have the option) The lightweight elastic that goes around the ear makes these much more comfortable than some of the other masks I've seen.  A portion of the proceeds of these masks and all other items sold on my website during this time will be donated to the south Jersey Food pantry and FOOD4STAFF(feeding our front line heroes).  To all that are working on the front lines, that includes all essential workers, delivery, supermarkets and food stores, thank you for your service