It contains dry nitrogen gas to retard fogging and condensation. Specialist formulations are available for ultra-low volume spraying, fogging, fumigation, "etc". Each viewport blows fresh dehumidified air across its glass to prevent fogging. The mask also contains an inner oro-nasal mask to decrease fogging on the lenses. These lenses are much less prone to fogging. The FM12 also has an inner mask to prevent fogging of the lenses. Other descriptions of this experience include a monocular blindness, dimming, fogging, or blurring. Water consumption is less than that of fogging cooling. Beside fogging there are some other insect repellents for indoors and outdoors. The GP-5 kit consists of SHM-62 face piece, GP-5 filter, bag and anti fogging lenses. One important limitation commonly associated with these devices is fogging of the lens. It must prevent fogging inside the cabin and de-ice from . Several gas turbine manufactures offer both fogging and wet compression systems. This can also help reduce fogging of the viewport, which can seriously restrict vision. Fogging masks can be a significant hazard while playing.