Are the Sundra lenses polarized?

Yes. This version ships with polarized CR39 lenses, which reduce glare from water, snow and car hoods. The brown tint keeps colors fairly natural.

Will these fit a wide face?

Probably not. The 53mm lens width and 143mm temple width are on the small side, so they suit narrow to medium faces. Measure a pair you already own before buying.

What is CR39 and is it durable?

CR39 is a scratch-resistant polymer lens material, lighter than glass and standard for mid-range sunglasses. It resists scratches but is not shatterproof, so store it in a case.

Do they block UV fully?

The lenses are rated 100% UVA and UVB, so they meet the standard protection claim for sunglasses. That matters more than tint darkness for eye safety.

What comes in the box?

Expect the sunglasses themselves; a case and cloth are not confirmed in the listed specs. Ask the seller before ordering if a hard case matters to you.

How do they compare with cheaper polarized sunglasses?

The difference is the bio-acetate frame and Comotec hinges, which usually outlast molded plastic frames. Lens performance is comparable to other polarized CR39 pairs.