Well it works perfetly but if you get shot on the lens where you put it its terrible. If you get shot in the head all the time, DO NOT GET THIS PRODUCT.
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Good
August 30, 2012
Reviewer:
dfg asdf
from Conroe, TX United States
Ive used this spray for 4months now, makes the lens clearer and less scratched a bit. But only keeps your mask from fogging untill your lens gets paint on it. Get shot in the mask lens and you won't be able to see a thing.
Try not to get shot on lenses.... 
Good