Basic Anti-Fog
If you don't experience a lot of fogging issues, a cheaper goggle that has an anti-fog coating and medium size vents near the top is a good option. Oakley's Proven OTG ($50 to $60, depending on lens, 2010 prices), is one popular inexpensive option for skiers needing an all-purpose OTG goggle. Those looking at something with a little better performance might prefer the Zeal Rapt OTG ($99). For kids, the Bolle Boost OTG ($22) is a good model for kids six and up.
Double Lenses
Better anti-fogging goggles employ a double-lens system. Dual-lens goggles employ two lenses with an anti-fogging coating. Fogging is usually caused by warm air from your nose and mouth meeting cold air on the outside; a dual-lens system helps prevent fogging by creating a layer of dead air between the outer lens and inner lens so the temperature difference is greatly reduced. The Scott Heli OTG ($65) and Smith Cariboo OTG ($45) use dual lenses, while the Bolle Y6 Modulator OTG ($89) has a dual lenses that adjust to different lighting conditions on the slopes.
Fans
For skiers and snowboarders who experience severe fogging, the best solution is a goggle that has a small electric fan inside it that helps circulate air prevent fogging. These goggles are extremely effective at preventing fogging. The Smith Knowledge Turbo ($129) is one such goggle. The fan on the Knowledge Turbo has two speeds and can run for up to 100 hours before battery replacement.
