This stuff may itch less than fiberglass since I grabbed it with my bare arms and barely noticed any itching, but as far as breathing it and getting it in your eyes, that stuff is way worse. I've cut holes in boats before and never had any breathing issues or felt like I had sand in my eyes. I felt like I had sand in my eyes just loading it on the trailer, didn't even open the plastic. Well one was ripped open, maybe that was it. Im okay now though. I didn't put up many. Just 4 bats to see how it would fit and to figure out a good method to hold it in place. I ordered some 1" duct strapping to hold atleast the ceiling part in place. I'm going to run the strips across the rafters every 12" or so.