i used to be the first guy laying face down in a bat of insulation without even thinking about it, and just dealing with all the irritation. But since i had my first kid now i think of things a little different.....now i picture all the **** that i see floating in the air in the illumination of my droplight, and i just imagine how that stuff is just loading up in my lungs, doing god knows what and taking who knows how many years off my life. i have since started wearing disposable respirators rated for insulation. the only problem is that i sweat alot.....a real lot...and a disposable respirator will become sweatlogged in no time, making it too hard to breathe through...ill go through 3 or 4 a job. do any of you use a half face reusable respirator with changable filter that is not too difficult to work with? alot of them seem way to big to actually expect to wear while i work for 5-8 hours.