OMFG a Nuclear Crisis?!?! The new airsoft Russian Anti-Fog Safety Gas Mask w/Fan system, is a decent face mask with clear lenses. This roomy mask also allows you to wear prescription eyeglasses underneath if needed. The removable 'air filter' is actually a fan system that runs on 2-AA batteries (not included). An on/off switch turns the fan on, which blows air directly onto the clear lens area! Very nifty for those airsoft players in hot and humid climates. It also keeps the inside of the mask cool and dry. The filter can be either on the right or left side of the mask, your choice! Has a bunch of adjustable straps that can accommodate any sized head, resulting in a very comfortable mask - considering the size and bulk of the mask. The lenses get some taking used to, your perspective may be a little off, but function well overall.Update 7/2014: This is a new and improved version that is in fact airsoft worthy. Use at own risk, but the newer version has stronger lenses and is much better in terms of construction materials. 2014 version also has much clearer lenses (they have protective film on them; remove both sides of film before use) that are secured in place with notches and sealant.The quiet fan system is nearly silent, but is meant to be turned on and off as your masks starts to fog. It will clear fog up in a matter of seconds, so there's no need to run it constantly. The power button is easy to toggle.Can also be used for cosplay. Russian military / Spetznaz urban style mask, very cool in person to see. Comes in black, od green, and desert tan colors. Defcon countdown baby!