First of all they look great I love the light green tint I love that they auto darken very quickly I love that they’re lightweight and they do exactly what the description says 5 starMe encantan mis lentes, realmente oscurecen al sol, el material es bueno y llegaron a buen tiempo… recomendadoIt is supposed to block lots of UV, not sure how to test. To my knowledge, plain glass can block some of UV naturally. Anyways, it came with a little UV light and when you direct the UV, you can see the glass darkening quickly. It takes longer to go back to normal but it is colormatic for sure. Also it works really nice indoors when you enter buildings from outside. You don't feel the darkening effect. I like them.the picture shows it gets tinted like a regular sunglasses but it doesn't.I don't recommend it direct hot sun, it's better for cloudy with some sunshine weather.The glasses are light weight and comfortable. The yellow tint is nice for dusk, dawn and shady days but the transition is not as fast or noticable as you would hope and they do not get dark enough when it's bright out; certainly not as dark as advertised on the Amazon page. They are not awful but not worth the price.ComfortableI always try to give the benefit of doubt; but this product succeed on being a waist of money. It is a complete lie. 1st of all, delivery lost package. I requested a refund. A week later, they were delivered. 2nd of all...Shade does not turn darker in sunlight. Shades stay clear. I mean, crystal clear ?‍♀️. It is very disappointing on Amazon selling items that ultimately; misrepresent the company. Shame!Item doesn't even deserve a star, not even half of star.Just put them on and forget about them.I'm very impressed of the quality of this avaitor photochromic sunglasses. The metal frame is durable and the nose grip pads are comfortable. It prevents the sunglasses from falling off. It fits perfectly. The eye size is 58, the bridge width is 16 and the temples length is 132. I like that the lenses darkens when it's worn outdoors and it gets lighter indoors. It transitions quickly so I don't have to remove this sunglasses when I go back inside. It provides good eye protection and it's very stylish as well. It's great that it includes a protective case. I highly recommend this product. Hopefully, this review is helpfulThe overall quality is very good, the sunglasses are lightweight and comfortable, and the polycarbonate lenses ensure a crystal clear vision, with no distortions. The Photochromic transition is fast and I don't need to take off the glasses when I get inside from the strong outdoor sun. The AR coating is efficient and the vision is perfect. There is a bluish AR coating even on the back of the lenses (that is why the image is so clear).These glasses are not only comfortable but also elegant, with a quality frame. The silicone nose pads are gentle on the nose and don't leave marks even after hours of wearing the glasses. The glasses are staying in place very well, and do not slip down, also due to the spring-hinge that offers flexibility for the arm. So, no worries, it fits well (even if I have a pretty small head). The design is beautiful, as Aviator sunglasses will be always on trend :) Definitely, I like them a lot and that price is right. Very happy.I've been hesitating to review these as I wanted to give them a chance to get "broken in". I remember a friend in high school got "transitions" prescription glasses, and we teased him a bit when he wore them indoors because they were still tinted. He said they needed to go through multiple cycles of dark/light to get the reaction happening. True? I don't know.The TJUTR Avaitor Photochromic Sunglasses Are well made and comfortable to wear. They come with a felt case which is kind of cute. It's stiffer than the bags that a lot of glasses come with, but not hard like a hard case.The thing is, I can't tell if these change shade. I've worn them driving and out and about, but I keep tucking them away as they don't seem to darken.... at all. They have a light tint which does provide some glare reduction. I pulled out one of those "polarizing testers" but these did not reveal the hidden image.In an effort to determine their darkening ability, I left them out in the yard in the sun all afternoon. Then I took another pair of regular aviators for comparison. I took some photos to see the difference. When looking at the inside, if the angle is right, they look kind of purple, but straight on, always seem just lightly tinted. Maybe my expectations for these types of glasses is too high. Maybe they never get very dark. Maybe mine are faulty -- if that's possible. I'm a bit disappointed in these.