Don the Oakley A Frame Goggles and try farting in them to fog them up. It may sound gross, but itAAAs probably an effective method for testing OakleyAAAs integrated dual-lens and surge-vent technology. Or hit the mountain and leave the beans at home. Oakley sealed a layer of air between two fog-treated lenses to reduce the chance of fog accumulating. Vented air circulates through the bottom of the A Frame and back out the top so air doesnAAAt have a chance to get trapped in your goggle and fog your lens. Impact resistant frames, triple-layer foam with wicking fleece, and total UV protection make the A Frame the workhorse of OakleyAAAs lineup. Product FeaturesFrame Material: polyurethanePolarized Lens: Helmet Compatible: yesEyeglass Compatible: noVentilation: surge ports on bottom, top ventingFace Size: small, mediumGrip Strap: Recommended Use: winter sportsManufacturer Warranty: 1 year