The idea is simple - you wear a rain coat when it's raining, not when it's sunny. When the conditions are wet and the traveling is going to be rough, take along the Alumina RainCote Kit. RainCote water shedding lens protectors are specially coated, so that water instantly sheds off the lens surface, reducing the glare from water droplets. Water spot staining is reduced too, minimizing repeated cleanings that can damage the lens. Finally RainCote lens covers are replaceable, so after years of wear and tear, a new cover will give your Leupold riflescopes a fresh layer of protection. RainCote water shedding lens protectors are included for both objective lenses and eyepieces. Also included is the Alumina RS Stacker, a compact, protective storage device for the Alumina RainCote Kit components that you can carry in a pocket or pack.