Which color are the hardest to see the wearer's eyes through?

All the mirrored lenses and black lenses ensure your eyes can't be seen through.

What's the difference between polarized and non-polarized?

The polarized lens can filter all reflective glares，show the true color of objects and block uv rays while non-polarized lens can only block uv rays.

What kind of people need polarized lens?

Polarized lens is good for driving, fishing, skiing, cycling, climbing. It's also good for sensitive eyes.

Are they unisex sunglasses?

Yes. They are suitable for both women and men.

The sunglasses' size is suitable for which kind of face?

The sunglasses is medium size. If you can wear most normal sunglasses, you can choose these sunglasses. But if you have a very slim or a very wide face, it may be not suitable for you.