I had to wear an N95 mask several hours a day when polishing/ grinding/buffing stainless steel and aluminum. Uncomfortable but never a problem with getting enough oxygen or too much Co2 that I'm aware of. There's an awful lot of whine ass little babies here that like to bitch and moan about wearing a mask for a few minutes while going into a store etc.. They sure as hell ain't made out of the same material as their forebears that lived through the rationing of gas/food etc. during WWII and frankly I'm damned tired of listening to the little pussies.
^^^Scared to death.^^^
