Base Lens: PRIZM MTB Trail Torch From Enduro to Downhill, with the Airbrake MTB Goggles, you can say goodbye to fog, heat buildup, and dirt, leaving your competition in the dust. The exclusive Factory Lite Vent mesh structure ensures increased airflow and better ventilation at lower speeds while preventing mud, dirt, and stones from entering the goggles. PRIZM Lenses Prizm is a revolution in lens optics built on decades of color science research. Prizm lenses offer unprecedented control of light transmission, specifically tuning colors to maximize contrast and enhance visibility.