The stylish, medium fit frame offers many features, including Expansion View Technology for a wide field of view, anti-fog lens coating and Seamless Compatibility with all Giro helmets.The goggles are OTG friendly too, meaning you can wear your prescription glasses comfortably underneath and an increased air volume inside the goggle will ensure your vision still remains clear, crisp and fog-free. Expansion view technology - for fantastic peripheral vision OTG (over the glasses) friendly - prescription eye wear friendly EXV frame designDouble-layer face foam with microfleece facing Anti-fog coating Seamless compatibility - ensuring a seamless interface between helmet and goggleSilicone on inside of strap - prevents slippage