Fogging is a common issue faced by airsoft players due to varying temperatures and intense physical activity during gameplay.Guard Dog GOGGS Over-RX Goggles w/ Fogstopper, Carbon Frame These goggles are designed with an Over-RX style, specifically engineered to fit comfortably over most prescription eyewear, providing an additional layer of protection for your eyes.. The defining feature of these goggles is the advanced FogStopper Clear Lens technology.