The most versatile goggle on the planet. From a 1:00 am alpine start on Rainier to the 24 hour sun of Alaska, changing light conditions are challenging and the Revolution will handle it well with its Zebra photochromic lens. The lens darkens or lightens depending on the light's intensity, and can change from a light transmission rate of 40.7% to just 6.6%! An anti-fog coating, directly integrated via laser, guarantees maximum efficiency and long life.