EZ to apply to glasses, however, material scratches and clouds very easily which hampers clear vision. Presently, very hard to obtain. Told the material is not available. Good concept with good coverage of eyes. If only the material was more durable. Back in the 90's I purchased a pack of 12. All but 2 were scratched and clouded. Back to clip-ons unfortunately.
Due to unavailability of the darker slip-behinds, I bought the amber. My previous cataract and glaucoma surgeries, combined with the amber style, results in way to much light entering my eyes for daytime use. It causes a lot of discomfort and tearing. These are probably best used at night for blocking blue light headlights from on coming traffic. Can't recommend these for daytime use.
These were the only wrap around polarized glasses that fit my 6" wide frames without popping off! I can't wait to get the shaded ones when they become available.
These slip in sunglasses are terrific. They wrap around so there is protection from the sides. Easy to slip off and pocket when you need to. They work out so much better than prescription sunglasses, where you have to have two pair of glasses with you.
I am a repeat customer. They are convenient and work well.