Expansion View (EXV) Technology Perfected at Giro's test lab in Scotts Valley, California, this groundbreaking new frame design serves up unparalleled peripheral vision. we started with a helmet-compatible google, and then shaved down the frame rim and added frameless zones to optimize a massive spherical lens focused on the best posssible peripheral vision on a goggle. Quick Change Lens System The Quick-Change Lens System uses self-locating magnets to assist in lightning-fast lens replacement. Four snap pins keep the lens securely locked in place. Toric VIVID Lens wiht Optics by ZEISS Toric Spherical in shape, this lens mimics the form of the human eye to provide superior optics while creating increased air volume inside the goggle to help prevent fogging. The manufacturing, testing, and quality control of all Giro spherical lenses is provided by ZEISS Optical, the global leader in optical technology and photography. EVAK Vent Technology Found exclusively on VIVID goggles models, EVAK Vent Technology uses a new foam made from an ultra-durable, non-absorbent material. EVAK vents minimize the chance of fogging by releasing moisture while simultaneously creating a barrier from the elements. Seamless Compatibility For optimal performance of both helmets and goggles, Giro products are designed to work together, ensuring a seamless interface between helmet and goggle for an exceptional fit and dependable, worry-free function. Giro Contour RS + Vivid Royal Goggles