Bolle Vortex (Photo Clear Gray, Shiny Black) Plastic B-clear technology features ultra-lightweight trivex lens material, dual-sided hydrophobic/oleophobic coatings Carboglas Coating gives an armor shell from scratches and abrasions Optics Control System is an interchangeable lens System that allows you to swap out the lenses for different lighting conditions B88 frames are made of the finest grade Nylon for incredibly lightweight, durable, flexible frames Adjustable nose pads to tailor a custom fit, hypoallergenic and comfortable