I’m sure it will kill me while I’m sleeping, but 3M Ultrathon has worked very well for me for my truly deep-woods adventures in the Northeast during black fly season. Plus, lotion, so it goes where I put it, not in your mouth/lungs/eyes. I use it Mountain biking and sweat doesn’t seem to be an issue for it.

I’m sure it will kill me while I’m sleeping, but 3M Ultrathon has worked very well for me for my truly deep-woods…