Which size Dorma 99 should I wear?

Finding the right fit for your Dorma 99.

Most people will fit the medium Dorma 99. Fit tests were performed on users with a wide range of face shapes and sizes, and the medium size passed for all of the sizes on the NIOSH face panel (1-10). Thanks to its flexible lip, the medium is the best size for about 70% of the North American population. The small and large sizes will allow for added comfort for those who fall on either end of the NIOSH panel; small for sizes 1-3, and large for sizes 8-10.