xl csizma, Some divers cut the fingertips of the gloves off on the fingers most used for delicate work like operating the controls on a camera housing. Test data showed that the mean PFE values of 444 sterilized FFP2 face masks from the 19 CSSDs were 90±11% mean±SD, and those of 474 new, imported KN95,FFP2 face masks were 83±16% mean±SD.