A good alternative to spraying your face with bug spray
The only reason I picked these up was to be able to protect my face and ears from the bug onslaught that I would no doubt face when I visited Guatemala. I've always hated showering my face with bug spray's and these seemed like a great way to avoid having to taste bug spray on my lips all day long. As for how effective they are, I can't give you a rating. All I can say is that my face never got bit and my lips tasted fresh all day long. Didn't seem to have issues with sweat washing away the protection either.