The Pit Viper Flip-Off Goggle is a flip-up snow goggle with a lens that lifts off the face to air out the eyes. A semi-frameless, low-profile frame opens up peripheral vision when the lens is down. What Our Gearhead(R) Experts Are Saying:"I flip the lens up in the lift line, and the warm, damp air behind it clears out before it can condense on the inside. It works with my helmet on, so I can vent between runs without pulling the goggle off."