Feels awkward but works fairly well
I spent a few days at aftershock music festival it's held out doors in a  park and usually by the third day it's a dust storm as all the grass has been absolutely trampled by the horde of metal zombies, by day four you have so much dirt in your sinuses it's awful. I popped these bad boys in and problem solved.<br /><br />It feels really weird but it's mostly discrete and saves you from inhaling a bunch of dirt.
Rating: 5 stars