The Julbo Aero Spectron 3CF Lens Sunglasses. Designed for those who seek out the most demanding of activities, be it a vertical mile or 100 mile trail race. The Aero is uncompromising when it comes to performance and comfort. The Zebra and Zebra Light photochromic versions guarantee a wide clear field of vision, regardless of light levels. The suspended lens construction provides outstanding ventilation even in the most intense situations. The Air Link temples provide a secure and comfortable fit while remaining as light as possible. Julbo Aero Spectron 3CF Lens Sunglasses Features Spectron 3CF Lense - Cat 3 Lense with a flash coating coloured, is suitbale for all types of activity Panoramic: Wide lens surface for broad field of vision. 3D Fit Nose: Special wingtips are adjustable in every direction Full Venting: Aerated structure that allows complete air circulation to avoid fog. Grip Tech: Flexible inserts adhere to the temples for maximum hold and comfort. Front Venting: Natural front air flow due to the lens shape or mounting structure