I am not happy that the mirror coating is already showing tiny chips when I have not even dropped these yet, but I really appreciated being able to throw on the yellow shield in a heartbeat for the firing range, then back for a long ride.Initially I opened the case and each part was individually wrapped in plastic wrap. There are three lenses included, a yellow, black and purplish color. The black seem to be the best at polarizing. I took a photo through each to compare. The case is hardened to well protect the glasses and extra lenses. The lenses are easily changed from one color to another. The lenses seem to stick well to the frame. The frame feels like HD plastic. These glasses also have a behind the head string retainer to keep you from loosing them if they fall off. I will have to give them a run on the trail with my bicycle to see how well they stay on my size 7 head. More to follow.Thai are nice spot sunglasses, very flexible lightweight the lenses are nice quality giving very clear visibilityI got these for my 9yo grandson who is an amazing pitcher. He loves these shades - the wide field of view is crystal clear and glare-free thanks to the polarization. They are light weight and fit comfortably under his hats. He loves that he can see everything clearly and doesn't get blinded by glare when he has to turn fast & look sunward. They are pretty durable too - he keeps them in the included shammy bag but just tosses that into his bat bag but they have held up very well.