Description This is the latest accessory from Save Phace. This fan kit will work in any Tactical Mask we offer. No more humidity inside the lens area of you mask. The fan was chosen to provide the most optimum air flow without drying your eyes out and at the same time will blow out any humidity build up. The result is perfect peripheral vision. The fan attaches to the inside of the mask and uses three AA batteries (not included) and will last for hours. You can watch a video of how to install the fan on youtube.