Works exactly as advertised! I play in the Pacific Northwest where it's cold and wet enough most of the year that fogging up glasses is a real challenge. I haven't had any problems with it and haven't used any additional anti-fog sprays or other products. I also really like that the lenses and foam can be removed easily enough to clean after a day of gaming. If you are on a budget I would say they are totally worth the price. I have friends who play with JT's less expensive dual lens thermal masks and while they work reasonably well, they don't weather well and are more difficult to clean effectively.
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