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corrected ANSI reference
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<blockquote>The game of airsoft is safe when played with the proper equipment, and with the right rules and enforcement. That is, if you can accept soft tissue contusions resulting in temporary welts in one's definition of safe. Eye protection is certainly the absolute precaution that cannot be compromised in airsoft. '''The American Society for Testing and Standards (ASTM.org) is currently developing standards for Airsoft which will require a minimum of full-seal goggles consistent with ANSI A87Z87.1 level of protection. Do not compromise on this requirement.''' Many players will experience fogging during play with even expensive goggles. This will not be tolerated by players, and that is why you find them breaking rules about full-seal goggles. Some have taken to using wire mesh products that do not protect with a solid barrier. Neither the ASTM nor myself can endorse such a product because of the inherent risk of fragments of bb's passing through the mesh, even if the mesh is strong enough to prevent intact bb's from passing. That being said, I have never heard of evidence of an injury occuring becuse of this theoretical risk.</blockquote>
<blockquote>The use of three accessories can help with fogging: anti-fog wipes/sprays, thermal lenses, and integrated fans. Anti-fog products are applied to the inside surface of the goggle before play and coat the plastic with a chemical which resists the adhesion of water vapor droplets. Thermal lenses are similar to two-pane windows in a home. The fogging occurs due to a temperature difference between the inside and outside of the goggles. Thermal lenses minimize this temperature difference. Fans work by providing ventilation to blow out the hot air inside the goggle which occurs when heat radiates from the player's face and is trapped inside the goggles. I personally use a fan that comes with ESS Profile goggles. The fan has two speeds. I can often run it on the low speed, but sometimes fogging will start. All I have to do is turn the fun up to the high speed to remove the fogging. I would promote these goggles more if they were not so expensive. There are many other similar goggles on the market, and the airsoft stores sell fan kits at a fraction of the cost of the ESS goggles. I have yet to work with the fan kit and less expensive goggles to give a recommended combination.</blockquote>