Lens Information
When selecting your goggles it is also very important to do a little research into the type of lenses. Generally all modern Snow Goggles have two lenses compared to dirt bike or motor cross glasses that consist of only one lens.
When wearing your goggles the temperature between your face and lens can become warm. Just as a window builds up with condensation in a warm house when the temperature is cold outside so does your goggle. Obliviously water vapor is needed for this to occur. This result can be best described to any skier or snow boarded as the dreaded fog. To prevent this from happening designers have established a multiple lens design. This works on the principle that the outer lens will be cold and the internal lens will be warm, meaning that the internal lens will remain at a similar temperature to that of any vapor which will not cause condensation/fog. It is important to note that between the lenses should remain air tight. When buying snow goggles the quality of the frame is important. Poorly constructed frames can result in air circulating between the lenses. Once this happens fog can build up between the lenses which are virtually impossible to remove.
Do anti-fogging chemicals and colors help?
Yes they do. All good quality snow goggles and lenses will be treated with anti-fogging chemical. Generally goggle companies will not disclose what chemicals they use as they are a closely guarded secret. You may have also seen how many dozens and dozens of colors available when buying lenses. The most common are the black/polarized lenses which are best for bright sunny days as they reduce glare as apposed to yellow lenses which enhance shadows and are better for darker days.
