These coated lenses allow only 15% transmission of light from the visible spectrum, (VLT), to reach the eye and are an excellent option on sunnier ski days. The iridium coating on this lens reduces glare, and also helps to balance out light transmission to the eye. This results in increased depth perception on not only sunny days, but also in low and flat lighting conditions. A great all around goggle lens you can feel comfortable wearing any day of the year.