The Julbo Venturi Zebra Antifog Photochromic Sunglasses are the result of close collaboration between Venturi's designers and trail running team. An anti fog coating keeps your field of vision clear as you work up a sweat, and the Grip Tech temples ensure the glasses don't slide down your face. Their fully vented design allows for ample airflow. The curved, wrapping fit provides a panoramic field of vision meanwhile, the photochromic lenses adjust to the ever changing light conditions, so you're always ready for what's ahead. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer andor birth defects or other reproductive harm.