Panoptx Chubasco sunglasses use Airlock, the ideal environment for your eyes. Beneath its plush fabric exterior is a tough inner shell, creating a non-air-permeable shield that blocks air penetration. The fast-drying fabric overcoat quickly absorbs and wicks away moisture. Filtered vents allow just the right amount of airflow. Removable, washable and replaceable, Airlock is armor for your eyes.