a towel: wrap it round your head to ward off noxious fumes or avoid the gaze of the Ravenous Bugblatter Beast of Traal (a mindbogglingly stupid animal, it assumes that if you can't see it, it can't see you - daft as a brush, but very very ravenous)
Here, I will heroically keep my eyes free so I can lead you to where we're going. Now, just step out here, over this precipi - I mean, this little rise here...
It doesn't always have to be you. *pries towel off of MY face also* You see? That's one of the dangerous parts about having a Duffer brother...who lives in the same house...