Revo Guide Polarized Sunglasses Motion Fit frame design positions your sunglasses to ideal locations on your nose and ears. This creates a fit that is free of unwanted pressure points. Unlike other sunglasses, Revo Motion Fit frames are designed around the lenses and not the other way around. All this delivers optical clarity from any angle, reduced eyestrain, and a very comfortable fit. Serilium Lenses are made from the purest form of polycarbonate known to man. Serilium lenses are one of the only materials capable of withstanding high-velocity impact from objects like gravel. To top it off, Revo's Serilium lenses are infused with High Contrast Polarization technology. Revo High Contrast Polarization achieves a premium level of clarity and contrast by not only blocking glare but by also optimizing your vision and the color spectrum delivered to your eyes. Anti-Reflective lens coating eliminates the light that is reflected off the inside of the lens from the surrounding environment for improved visual acuity. Element Shed is an exclusive lens coating that ensures virtually anything will roll right off the surface of the lens. The sweat off your brow, the oil on your fingers, the dirt flying at you won't find refuge on these lenses! It simply keeps your lenses cleaner longer.