Ideal Spoet Sunglasseswith 1.6mm Thick Polorized Lens.Lens Colour : G-15 - The most common and popular of all of the lens colors. Brown - Especially good at blocking the scattared blue light commonly found in diffused light such as one might experience on a cloudy day. REVO Red Mirror - Mirror coated options for extra bright days. PC Clear Lens - Provide eye protection for night-time biking or outdoor activities on overcast days when you still need to shield your eyes from wind flying debris. PC Yellow - These lenses, long favored by hunters, target shooters and "night riders", greatly enhance contrast and give a sensation of heightened visual aculty.