Protect your optic during poor weather conditions, Butler Creek Blizzard Scope Caps allow you to take the shot while keeping the weather elements off your lens. These caps feature lenses crafted of optical-grade polymers for optimum clarity and light transmission - the best of any see-through cover. The caps also provide a weather-resistant seal, ambidextrous open and close, silent, spring-loaded operation, and tested reliable in extreme conditions. Blizzard scope caps are available in multiple sizes to fit objective and ocular lenses.