This is the greatest thing since sliced bread! I love this lens! For those of you who have tried Transitions lenses in the past, you have experienced a wonderful product with really just one significant shortcoming….they don’t get dark in the car. That’s because Transitions technology is based on UV light. UV light is blocked by the windshield of the car (that’s a good thing because who would want a sunburn from sitting in the car). BUT! WAIT NO MORE! There is a wonderful product available called Drivewear. This is a POLARIZED PHOTOCHROMIC lens. It is designed to be enhanced function sunwear. So, don’t be confused. It is not designed to be used as a clear pair for full time that gets dark in the car. It is SUNWEAR. It always has at least a light tint. In the industry, we often refer to tints on a scale of 1 to 3 with 1 being the lightest tint color and 3 being the darkest. This lens always has at least a level 2 tint which comes frmo the polarization. This lens gets darker as you are exposed to light. This lens is different from Transitions because it is activated both by UV light (like Transitions) as well as visible light (UNIQUE!). So, indoors it will be a level 2 tint, acceptable for use when you say, run into the grocery store. When you are in the car, the visible light will change the lens to a 2 1/2 level brownish tint. When you are outside, the visible light in combination with the UV light to create a very dark level 3 tint …. AND ITS POLARIZED to create the most comfortable outdoor viewing environment. Talk to our lens designers about this lens, you won’t be disappointed!