Challenge glasses are designed for shooters. Available in 4 different colors with an adjustable nose pad. UV 400 protection. Available in: Yellow: For dim light conditions or fog Increases brightness Enhances the color of the target Purple: Reduces any green background color Gives true depth to the background Enhances orange targets Orange: For very bright conditions Enhances orange targets Enhances bright colors Neutral: For all light conditions without creating contrast | BerettaUSA | Challenge EVO Glasses in Neutral