A "Clean Room" is a term used in manufacturing
https://www.americancleanrooms.com/cleanroom-classifications/
They have different classes, we made copper clad laminate for printed circuit boards and you could not have any dust in side a circuit board or you would have a short... a class 10000 is less than >0.1 um per square foot
Kind of a pain because you had to be covered from head to toe when entering and you went through a couple air chambers/showers to remove airborne particles
So yes the ones I used are overkill for you