Great question!

The easiest way: use the "Measure My Glasses" tool above and we'll show you exactly which fitovers fit. You can also find detailed measurements on every product page.

Don't worry about the shape of your glasses — round, square, cat-eye, anything goes. Our fitovers sit right on top of your frames and stay put. As long as your glasses are within the listed width and height (not bigger), they'll fit perfectly.

All Fitovers come with polarized lenses (Category 3) that block 100% of UV rays and reduce glare.

* Category 3 lenses aren’t too dark, so they’re safe for driving, biking, hiking, etc.

Yes! When you put them on, the edges help keep your glasses in place so they won’t slide around. They also protect your regular glasses from scratches and keep the lenses from touching.

Not at all! They’re super lightweight and don’t press on your nose or temples. You’ll probably forget you’re even wearing them.